{"id":2382,"date":"2023-09-18T17:52:04","date_gmt":"2023-09-18T15:52:04","guid":{"rendered":"https:\/\/www.a2d.ai\/perrea%c2%b2d-detection-characterisation-and-ongoing-monitoring-of-deterioration-to-weak-structures\/"},"modified":"2025-12-05T18:09:01","modified_gmt":"2025-12-05T17:09:01","slug":"perrea%c2%b2d-detection-characterisation-and-ongoing-monitoring-of-deterioration-to-weak-structures","status":"publish","type":"page","link":"https:\/\/www.a2d.ai\/en\/our-solutions\/civil-engineering\/perrea%c2%b2d-detection-characterisation-and-ongoing-monitoring-of-deterioration-to-weak-structures\/","title":{"rendered":"Detection, characterization and temporal monitoring of deterioration in weakly structured structures"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2382\" class=\"elementor elementor-2382\" data-elementor-post-type=\"page\">\n\t\t\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-6a676e3 e-con-full e-flex e-con e-child\" data-id=\"6a676e3\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;slideshow&quot;,&quot;background_slideshow_gallery&quot;:[{&quot;id&quot;:708,&quot;url&quot;:&quot;https:\\\/\\\/www.a2d.ai\\\/wp-content\\\/uploads\\\/2023\\\/09\\\/IMG_1617.jpg&quot;},{&quot;id&quot;:707,&quot;url&quot;:&quot;https:\\\/\\\/www.a2d.ai\\\/wp-content\\\/uploads\\\/2023\\\/09\\\/IMG_1606.jpg&quot;}],&quot;background_slideshow_loop&quot;:&quot;yes&quot;,&quot;background_slideshow_slide_duration&quot;:5000,&quot;background_slideshow_slide_transition&quot;:&quot;fade&quot;,&quot;background_slideshow_transition_duration&quot;:500}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-75458f8 elementor-widget elementor-widget-breadcrumbs\" data-id=\"75458f8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"breadcrumbs.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p id=\"breadcrumbs\"><ul><li><a href=\"https:\/\/www.a2d.ai\/en\/home-2\/\">Home<\/a><\/li><\/ul><\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-62a922f e-flex e-con-boxed e-con e-child\" data-id=\"62a922f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-2287506 e-con-full e-flex e-con e-child\" data-id=\"2287506\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-522feaf elementor-widget elementor-widget-heading\" data-id=\"522feaf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">OUR SOLUTIONS<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e996745 elementor-widget elementor-widget-heading\" data-id=\"e996745\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Detection, characterization and monitoring of damage to weakly structured structures<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-28dbb34 e-flex e-con-boxed e-con e-parent\" data-id=\"28dbb34\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-79d9ea61 elementor-widget elementor-widget-text-editor\" data-id=\"79d9ea61\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>How can we anticipate the adaptation of our coastal territories?<\/p><p>This is a matter for economic partners and local authorities (D\u00e9partements, Agglomerations, communes), because the stakes are of social and economic importance: preserving the coastline of our coastline and the banks of our marshes.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-e698aca e-flex e-con-boxed e-con e-parent\" data-id=\"e698aca\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-55848cfc e-con-full e-flex e-con e-child\" data-id=\"55848cfc\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c3f1e4b elementor-widget elementor-widget-video\" data-id=\"c3f1e4b\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/youtu.be\\\/-OhsIvaA73E&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-154631ce e-con-full e-flex e-con e-child\" data-id=\"154631ce\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-56f5c7e2 elementor-widget elementor-widget-heading\" data-id=\"56f5c7e2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Our solution<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3ad7a094 elementor-widget elementor-widget-text-editor\" data-id=\"3ad7a094\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Using two drone inspections staggered in time, our solution automates the analysis of damage to a structure by quantifying :<\/p><ul><li>its deformations along axes chosen graphically by the user,<\/li><li>and the movement of materials (boulders, riprap, etc.).<\/li><\/ul><p>Our visual indicators highlight the relevant business information to trigger the actions needed to preserve the structure, quickly and with maximum certainty.<\/p><p>Note that the raw data is always accessible to the Expert, so that he can clarify any doubts.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-46c89757 e-flex e-con-boxed e-con e-parent\" data-id=\"46c89757\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-282645a elementor-widget elementor-widget-heading\" data-id=\"282645a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Customer benefits<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-91703a9 elementor-widget elementor-widget-text-editor\" data-id=\"91703a9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Saving time is a major advantage of our approach, enabling us to carry out maintenance operations in the right way.<\/p><p>The digitization of the work allows the User, in real time, to view :<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-63676889 e-flex e-con-boxed e-con e-child\" data-id=\"63676889\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-7fe611c8 e-con-full e-flex elementor-invisible e-con e-child\" data-id=\"7fe611c8\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;animation&quot;:&quot;fadeInUp&quot;,&quot;animation_delay&quot;:0}\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-5626067a e-flex e-con-boxed e-con e-child\" data-id=\"5626067a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-400e527d e-flex e-con-boxed e-con e-child\" data-id=\"400e527d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6c562d71 elementor-widget elementor-widget-text-editor\" data-id=\"6c562d71\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Automatic production<\/strong> of cross-sections positioned on demand.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5432a8b8 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"5432a8b8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-42d11189 e-con-full e-flex elementor-invisible e-con e-child\" data-id=\"42d11189\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;animation&quot;:&quot;fadeInUp&quot;,&quot;animation_delay&quot;:0}\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-6c7dd9cd e-flex e-con-boxed e-con e-child\" data-id=\"6c7dd9cd\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-f1b18ec e-flex e-con-boxed e-con e-child\" data-id=\"f1b18ec\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-11f3cd80 elementor-widget elementor-widget-text-editor\" data-id=\"11f3cd80\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Automatic comparison of<\/strong> the evolution of a cross-section with a history.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3680eed elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"3680eed\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-17977b8c e-con-full e-flex elementor-invisible e-con e-child\" data-id=\"17977b8c\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;animation&quot;:&quot;fadeInUp&quot;,&quot;animation_delay&quot;:0}\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-6addd80a e-flex e-con-boxed e-con e-child\" data-id=\"6addd80a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-cd95612 e-flex e-con-boxed e-con e-child\" data-id=\"cd95612\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1b83ccd2 elementor-widget elementor-widget-text-editor\" data-id=\"1b83ccd2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Automatic, geo-referenced identification of<\/strong> material movements by volume.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6859248d elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"6859248d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-be803ac e-con-full e-flex elementor-invisible e-con e-child\" data-id=\"be803ac\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;animation&quot;:&quot;fadeInUp&quot;,&quot;animation_delay&quot;:0}\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-42666c9 e-flex e-con-boxed e-con e-child\" data-id=\"42666c9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-3619459 e-flex e-con-boxed e-con e-child\" data-id=\"3619459\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-179d199 elementor-widget elementor-widget-text-editor\" data-id=\"179d199\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Automatic, real-time extraction<\/strong> of raw HD photos, for more reliable decision-making by the Expert.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e3a6346 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"e3a6346\" data-element_type=\"widget\" data-e-type=\"widget\" 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fill=\"#01516c\"><\/path><path id=\"Trac&#xE9;_33760\" data-name=\"Trac&#xE9; 33760\" d=\"M13.877,1.833A1.176,1.176,0,1,0,11.75.938a1.192,1.192,0,0,0-.024.237,1.175,1.175,0,0,0,.024.236,1.17,1.17,0,0,0,.32.595,1.175,1.175,0,0,0,1.806-.174\" transform=\"translate(-0.277 0)\" fill=\"#01516c\"><\/path><\/g><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-4a5d5fea e-flex e-con-boxed e-con e-parent\" data-id=\"4a5d5fea\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6d28a5ee elementor-widget elementor-widget-heading\" data-id=\"6d28a5ee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">In a nutshell<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-141288a8 e-flex e-con-boxed e-con e-child\" data-id=\"141288a8\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-2a4c1990 e-con-full e-flex e-con e-child\" data-id=\"2a4c1990\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5f46dd96 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"5f46dd96\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Our application automatically takes an RTK drone shot of the structure:<\/p><ul><li>position cross-sections manually by the user, or equi-separated according to a user-selected path,<\/li><li>calculate and visualize, in real time, the slopes of these cross-sections,<\/li><li>compare the condition of the structure with that of a previous inspection (superimposition of cross-sections, identification of material displacements),<\/li><li>assess the volume of material movements,<\/li><li>confirm automatic choices by selecting raw photos, taken by the drone in high resolution, describing the area of interest concerned,<\/li><li>graphically measure lengths, areas and volumes.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>OUR SOLUTIONS Detection, characterization and monitoring of damage to weakly structured structures How can we anticipate the adaptation of our coastal territories? This is a matter for economic partners and local authorities (D\u00e9partements, Agglomerations, communes), because the stakes are of social and economic importance: preserving the coastline of our coastline and the banks of our [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2644,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-2382","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<title>A2D | Detection and monitoring of damage to weakly structured structures<\/title>\n<meta name=\"description\" content=\"Using two drone inspections staggered in time, our solution enables automatic analysis of damage to a structure.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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