{"id":3239,"date":"2026-07-26T18:53:20","date_gmt":"2026-07-26T18:53:20","guid":{"rendered":"https:\/\/www.rattech.com\/rotter-i-kaelderen\/"},"modified":"2026-07-26T18:53:20","modified_gmt":"2026-07-26T18:53:20","slug":"rotter-i-kaelderen","status":"publish","type":"post","link":"https:\/\/www.rattech.com\/pl\/rotter-i-kaelderen\/","title":{"rendered":"Rotter i k\u00e6lderen: tegn, \u00e5rsager og giftfri bek\u00e6mpelse"},"content":{"rendered":"<style id=\"rt-blog-enrich\">:root{ --rt-navy:#1D3557;--rt-navy-d:#143852;--rt-navy-ink:#0f2740; --rt-ink:#1e293b;--rt-muted:#5b6b80; --rt-orange:#F28023;--rt-orange-d:#d76d13;--rt-peach:#FFBC7D; --rt-bg:#F4F6FA;--rt-bg2:#eaeef6;--rt-paper:#FBFCFE;--rt-line:#DDE4EE;--rt-line-d:#C7D1E0; --rt-font:'Montserrat',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; --rt-body:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif; --rt-sh-sm:0 2px 10px rgba(15,39,64,.06); --rt-sh:0 12px 30px rgba(15,39,64,.10); --rt-sh-lg:0 26px 60px rgba(15,39,64,.16); 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margin:0 0 1em;overflow:hidden;box-shadow:var(--rt-sh-sm);} .rt-main tbody td{display:flex;justify-content:space-between;gap:1.1em;align-items:baseline; text-align:right;padding:.65em .95em;border-top:1px solid var(--rt-bg2);} .rt-main tbody td::before{content:attr(data-label);font-family:var(--rt-font);font-weight:700; color:var(--rt-navy);text-align:left;flex:0 0 42%;font-size:.86rem;} .rt-main tbody td:first-child{display:block;text-align:left; background:linear-gradient(180deg,var(--rt-navy),var(--rt-navy-d));color:#fff;font-family:var(--rt-font); font-weight:700;border-top:none;padding:.75em .95em;} .rt-main tbody td:first-child::before{content:none;} }\n<\/style>\n<div class=\"rt-article\">\n<div class=\"rt-main\">\n<p><strong>Rotter i k\u00e6lderen eller under gulvet kommer n\u00e6sten altid op gennem en defekt kloak. Du har pligt til at anmelde dem til din kommune, og effektiv bek\u00e6mpelse kr\u00e6ver, at indgangen bliver t\u00e6tnet. Giftfri, digitale f\u00e6lder afliver rotten mekanisk uden risiko for et r\u00e5dnende kadaver inde i konstruktionen.<\/strong><\/p>\n<h2>N\u00f8glepunkter<\/h2>\n<ul>\n<li>De hyppigste tegn er kradselyde om natten, sorte spidse ekskrementer p\u00e5 10-17 mm og en kloaklignende lugt.<\/li>\n<li>De fleste rotter i byerne kommer op via fejl i kloakken, vurderer Milj\u00f8styrelsen.<\/li>\n<li>Det er lovpligtigt at anmelde rotter til kommunen, uanset om du bor til leje eller ejer.<\/li>\n<li>Gift er problematisk under gulve: rotten kan d\u00f8 skjult i konstruktionen og give lugt og fluer.<\/li>\n<li>Giftfri, digitale f\u00e6lder afliver mekanisk og melder, n\u00e5r de har fanget noget.<\/li>\n<\/ul>\n<h2>Hvordan ved du, at der er rotter i k\u00e6lderen?<\/h2>\n<p>Du genkender rotter i k\u00e6lderen p\u00e5 tre ting: lyd, efterladenskaber og lugt. Om natten h\u00f8rer du typisk kradsen, puslen eller trippen bag v\u00e6gge og under gulvbr\u00e6dder. Langs sokler og bag opmagasinerede kasser finder du sorte, cylinderformede ekskrementer, der if\u00f8lge Bolius er spidse i den ene ende.<\/p>\n<p>En rottelort er cirka 10-17 mm lang og omkring 6 mm bred &#8211; markant st\u00f8rre end museklatter. En s\u00f8dlig, kloaklignende stank i et rum uden afl\u00f8bsproblemer er ogs\u00e5 et klassisk tegn, ligesom gnavem\u00e6rker p\u00e5 kabler, tr\u00e6 og isolering. Er du i tvivl, om det er rotter eller mus, kan du bruge vores guide til <a href=\"https:\/\/www.rattech.com\/forskel-paa-rotter-og-mus\/\">forskellen p\u00e5 rotter og mus<\/a>, for kommunerne registrerer hvert \u00e5r mange anmeldelser, der viser sig at v\u00e6re mus.<\/p>\n<figure class=\"wp-block-table\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Tegn<\/th>\n<th scope=\"col\">S\u00e5dan opdager du det<\/th>\n<th scope=\"col\">Hvor i boligen<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Lyde<\/td>\n<td>Kradsen, gnaven og trip om natten<\/td>\n<td>Bag v\u00e6gge, over lofter, under gulvbr\u00e6dder<\/td>\n<\/tr>\n<tr>\n<td>Ekskrementer<\/td>\n<td>Sorte, spidse klatter p\u00e5 10-17 mm<\/td>\n<td>Langs sokler, bag kasser, ved r\u00f8r<\/td>\n<\/tr>\n<tr>\n<td>Lugt<\/td>\n<td>S\u00f8dlig, kloakagtig stank<\/td>\n<td>K\u00e6ldre og rum t\u00e6t p\u00e5 gulvafl\u00f8b<\/td>\n<\/tr>\n<tr>\n<td>Gnavem\u00e6rker<\/td>\n<td>Afgnavet tr\u00e6, kabler og isolering<\/td>\n<td>R\u00f8rgennemf\u00f8ringer, gulvlister, ledninger<\/td>\n<\/tr>\n<tr>\n<td>Huller og reder<\/td>\n<td>Nyt jord, huller ved fundament, revet papir<\/td>\n<td>Ved sokkel, i krybek\u00e6lder, m\u00f8rke hj\u00f8rner<\/td>\n<\/tr>\n<\/tbody>\n<\/table><figcaption class=\"wp-element-caption\">Typiske tegn p\u00e5 rotter i k\u00e6lder og under gulv<\/figcaption><\/figure>\n<h2>Hvorfor kommer rotter op under gulvet?<\/h2>\n<p>Rotter under gulvet stammer n\u00e6sten altid fra kloakken. De fleste rotteforekomster i byerne skyldes fejl i kloaksystemet, vurderer Milj\u00f8styrelsen, fordi rotter er dygtige sv\u00f8mmere, der finder brud, ut\u00e6tte samlinger og gamle, sl\u00f8jfede stikledninger. Herfra graver de sig op i krybek\u00e6ldre og hulrum under gulvet.<\/p>\n<p>Under en k\u00e6lder eller et terr\u00e6nd\u00e6k er der ofte skjulte r\u00f8r, jordforbindelse og varme &#8211; alt hvad en rotte skal bruge for at sl\u00e5 sig ned. Derfor er k\u00e6ldre og krybek\u00e6ldre de steder, hvor vi i vores erfaring fra ejendomme p\u00e5 Sj\u00e6lland oftest finder aktiviteten. S\u00e6tter du ind mod symptomet uden at finde og lukke indgangen, kommer nye rotter bare op ad samme vej.<\/p>\n<h2>Hvad skal du g\u00f8re f\u00f8rst?<\/h2>\n<p>Det f\u00f8rste du skal g\u00f8re, er at anmelde rotterne til din kommune. Det er lovpligtigt at anmelde rotter i Danmark, og du kan g\u00f8re det digitalt via <a href=\"https:\/\/www.borger.dk\">Borger.dk<\/a> eller kommunens egen selvbetjening. Kommunen har ansvaret for rottebek\u00e6mpelse og sender en rottebek\u00e6mper ud.<\/p>\n<p>Anmeldelsen g\u00e6lder, uanset om du er privat husejer, boligforening eller virksomhed. Bor du til leje, skal du give besked til udlejer eller administrator, som har ansvaret for at anmelde og udbedre. Samtidig kan du med fordel starte en aktiv, <a href=\"https:\/\/www.rattech.com\/\">giftfri rottebek\u00e6mpelse<\/a>, s\u00e5 du fanger dyrene, mens \u00e5rsagen i kloakken bliver fundet og udbedret.<\/p>\n<h2>Hvorfor er gift en d\u00e5rlig l\u00f8sning under gulvet?<\/h2>\n<p>Gift er is\u00e6r uegnet under gulve og i k\u00e6ldre, fordi rotten typisk d\u00f8r skjult inde i konstruktionen. En rotte, der har \u00e6dt gift, kan d\u00f8 flere dage senere langt inde i et hulrum, og resultatet er en ulidelig stank samt maddiker og spyfluer, du ikke kan komme til. Kadaveret kan sidde utilg\u00e6ngeligt i uger.<\/p>\n<p>Rottegift har desuden bredere ulemper: sekund\u00e6rforgiftning af rovfugle, ugler og k\u00e6ledyr, der \u00e6der en forgiftet rotte, samt risiko for resistens, hvor rotterne over tid t\u00e5ler giften. Derfor frar\u00e5der vi hjemmelavede midler som <a href=\"https:\/\/www.rattech.com\/salmiakspiritus-mod-rotter\/\">salmiakspiritus mod rotter<\/a> og peger i stedet p\u00e5 mekanisk, giftfri aflivning. Milj\u00f8styrelsen understreger samtidig, at kemi aldrig erstatter det vigtigste: at finde og lukke rotternes vej ind.<\/p>\n<h2>Hvordan fjerner du rotter giftfrit?<\/h2>\n<p>Du fjerner rotter i k\u00e6lderen giftfrit ved at aflive dem mekanisk med digitale f\u00e6lder og samtidig t\u00e6tne indgangen. En <a href=\"https:\/\/www.rattech.com\/product\/grundpakke\/\">digital rottef\u00e6lde<\/a> afliver rotten p\u00e5 et splitsekund med et elektrisk st\u00f8d og sender besked, n\u00e5r den har fanget noget &#8211; s\u00e5 du slipper for at lede efter et kadaver bag v\u00e6ggen.<\/p>\n<p>F\u00e6lderne er koblet til en router og overv\u00e5ges, og RatTech kommer og t\u00f8mmer og servicerer dem. Med et <a href=\"https:\/\/www.rattech.com\/product\/abonnement\/\">abonnement p\u00e5 rottef\u00e6lder<\/a> holdes systemet k\u00f8rende, indtil aktiviteten er v\u00e6k, uden at du h\u00e5ndterer hverken kemi eller d\u00f8de dyr. Er problemet mere omfattende, kortl\u00e6gger en <a href=\"https:\/\/www.rattech.com\/product\/gennemgang-af-ejendom\/\">gennemgang af ejendommen<\/a> b\u00e5de indgange og de rigtige placeringer til f\u00e6lderne.<\/p>\n<h2>S\u00e5dan forebygger du rotter i k\u00e6lder og under gulv<\/h2>\n<p>Den bedste forebyggelse er at holde kloak og bygning t\u00e6tte, s\u00e5 rotterne aldrig kommer op. Milj\u00f8styrelsen peger p\u00e5 vedligehold og hurtig reparation af skader i kloakken som den vigtigste sikring. En <a href=\"https:\/\/www.rattech.com\/?p=2072\">rottesp\u00e6rre monteret i kloakken<\/a> kan supplere, men den erstatter ikke vedligehold af r\u00f8rene.<\/p>\n<p>Tjek desuden, at ydermure, ventilationsriste og r\u00f8rgennemf\u00f8ringer er hele og lavet af materiale, rotter ikke kan gnave igennem, gerne galvaniseret st\u00e5l. Undg\u00e5 ophobet affald langs facaden, opbevar foder og madvarer i lukkede beholdere, og hold k\u00e6lderen ryddelig. Bor du i vores serviceomr\u00e5de, kan du l\u00e6se mere om lokal <a href=\"https:\/\/www.rattech.com\/rottebekaempelse-i-roskilde\/\">rottebek\u00e6mpelse i Roskilde<\/a> og de \u00f8vrige byer p\u00e5 Sj\u00e6lland.<\/p>\n<h2>Er rotter i k\u00e6lderen farlige for helbredet?<\/h2>\n<p>Rotter kan overf\u00f8re sygdomme, blandt andet leptospirose, ogs\u00e5 kaldet Weils syge, som if\u00f8lge Statens Serum Institut smitter via rotters urin. Bakterien overf\u00f8res gennem kontakt med forurenet vand eller urin p\u00e5 slimhinder og s\u00e5r, og symptomerne minder om influenza. I alvorlige, ubehandlede tilf\u00e6lde kan Weils syge v\u00e6re livstruende.<\/p>\n<p>Risikoen er st\u00f8rst, hvor du kommer i direkte kontakt med urin, ekskrementer eller stillest\u00e5ende vand i en k\u00e6lder med rotter. Undg\u00e5 at r\u00f8re efterladenskaber med bare h\u00e6nder, luft ud, og f\u00e5 aktiviteten stoppet hurtigt. Statens Serum Institut har de senere \u00e5r registreret flere tilf\u00e6lde, og en stor del af de smittede kommer fra hovedstadsomr\u00e5det og resten af Sj\u00e6lland.<\/p>\n<div class=\"rt-cta\">\n<h3>Slip af med rotterne \u2014 helt uden gift<\/h3>\n<p>RatTechs digitale f\u00e6lder afliver rotterne mekanisk og overv\u00e5ger d\u00f8gnet rundt. Vi st\u00e5r for montering, service og t\u00f8mning, s\u00e5 du aldrig skal h\u00e5ndtere hverken gift eller kadaver.<\/p>\n<p>  <a class=\"rt-cta-btn\" href=\"\/product\/grundpakke\/\">Se grundpakken<\/a>\n<\/div>\n<h2>Ofte stillede sp\u00f8rgsm\u00e5l<\/h2>\n<div class=\"rt-faq\">\n<details>\n<summary>Skal jeg anmelde rotter i k\u00e6lderen til kommunen?<\/summary>\n<div class=\"rt-faq-a\">Ja. Det er lovpligtigt at anmelde rotter til din kommune, og du g\u00f8r det digitalt via Borger.dk eller kommunens selvbetjening. Kommunen har ansvaret for rottebek\u00e6mpelse og sender en rottebek\u00e6mper. Bor du til leje, skal du give besked til udlejer eller administrator.<\/div>\n<\/details>\n<details>\n<summary>Hvordan ved jeg, om det er rotter eller mus under gulvet?<\/summary>\n<div class=\"rt-faq-a\">Rotter laver kraftigere lyde og efterlader st\u00f8rre, spidse ekskrementer p\u00e5 10-17 mm, hvor museklatter er sm\u00e5 og ligner riskorn. Rotter kommer typisk op via kloak og gulv, mens mus oftere ses h\u00f8jere oppe. Kommunerne f\u00e5r hvert \u00e5r mange anmeldelser, der viser sig at v\u00e6re mus.<\/div>\n<\/details>\n<details>\n<summary>Hvorfor skal jeg undg\u00e5 gift mod rotter under gulvet?<\/summary>\n<div class=\"rt-faq-a\">Fordi rotten ofte d\u00f8r skjult inde i konstruktionen, hvilket giver lugt samt maddiker og spyfluer, du ikke kan komme til. Gift kan desuden forgifte rovfugle og k\u00e6ledyr, der \u00e6der den d\u00f8de rotte, og rotter kan udvikle resistens. Giftfri, digitale f\u00e6lder afliver mekanisk uden de ulemper.<\/div>\n<\/details>\n<details>\n<summary>Hvordan virker en giftfri digital rottef\u00e6lde?<\/summary>\n<div class=\"rt-faq-a\">En digital rottef\u00e6lde afliver rotten mekanisk med et elektrisk st\u00f8d p\u00e5 et splitsekund og sender besked, n\u00e5r den har fanget noget. F\u00e6lden er koblet til en router og overv\u00e5ges, og RatTech kommer og t\u00f8mmer og servicerer den, s\u00e5 du hverken h\u00e5ndterer kemi eller kadaver.<\/div>\n<\/details>\n<details>\n<summary>Kan rotter i k\u00e6lderen g\u00f8re mig syg?<\/summary>\n<div class=\"rt-faq-a\">Rotter kan b\u00e6re sygdomme, blandt andet leptospirose eller Weils syge, som if\u00f8lge Statens Serum Institut smitter via rotters urin. Undg\u00e5 direkte kontakt med urin, ekskrementer og stillest\u00e5ende vand, og f\u00e5 aktiviteten stoppet hurtigt. I alvorlige, ubehandlede tilf\u00e6lde kan Weils syge v\u00e6re livstruende.<\/div>\n<\/details>\n<\/div>\n<h2>Kilder<\/h2>\n<ul>\n<li>Milj\u00f8styrelsen &#8211; Rottebek\u00e6mpelse og kloakrotter (2024)<\/li>\n<li>Statens Serum Institut &#8211; Leptospirose i Danmark (2023)<\/li>\n<li>Bolius &#8211; Rotter i boligen (2024)<\/li>\n<li>Borger.dk &#8211; Anmeld rotter til kommunen (2025)<\/li>\n<\/ul>\n<p><script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"BlogPosting\",\"headline\":\"Rotter i k\u00e6lderen: tegn, \u00e5rsager og giftfri bek\u00e6mpelse\",\"description\":\"Guide til rotter i k\u00e6lderen og under gulvet: tegn, hvorfor de kommer op via kloakken, lovpligtig anmeldelse og giftfri, digital bek\u00e6mpelse.\",\"inLanguage\":\"da\",\"datePublished\":\"2026-07-26\",\"dateModified\":\"2026-07-26\",\"author\":{\"@type\":\"Organization\",\"name\":\"RatTech\"},\"publisher\":{\"@type\":\"Organization\",\"name\":\"RatTech\",\"url\":\"https:\/\/www.rattech.com\/\"},\"mainEntityOfPage\":{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.rattech.com\/rotter-i-kaelderen\"}},{\"@type\":\"BreadcrumbList\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Forside\",\"item\":\"https:\/\/www.rattech.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Blog\",\"item\":\"https:\/\/www.rattech.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Rotter i k\u00e6lderen\",\"item\":\"https:\/\/www.rattech.com\/rotter-i-kaelderen\"}]}]}<\/script><br \/>\n<script type=\"application\/ld+json\">{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Skal jeg anmelde rotter i k\u00e6lderen til kommunen?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Ja. 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Kommunerne f\u00e5r hvert \u00e5r mange anmeldelser, der viser sig at v\u00e6re mus.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Hvorfor skal jeg undg\u00e5 gift mod rotter under gulvet?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Fordi rotten ofte d\u00f8r skjult inde i konstruktionen, hvilket giver lugt samt maddiker og spyfluer, du ikke kan komme til. Gift kan desuden forgifte rovfugle og k\u00e6ledyr, der \u00e6der den d\u00f8de rotte, og rotter kan udvikle resistens. Giftfri, digitale f\u00e6lder afliver mekanisk uden de ulemper.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Hvordan virker en giftfri digital rottef\u00e6lde?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"En digital rottef\u00e6lde afliver rotten mekanisk med et elektrisk st\u00f8d p\u00e5 et splitsekund og sender besked, n\u00e5r den har fanget noget. F\u00e6lden er koblet til en router og overv\u00e5ges, og RatTech kommer og t\u00f8mmer og servicerer den, s\u00e5 du hverken h\u00e5ndterer kemi eller kadaver.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Kan rotter i k\u00e6lderen g\u00f8re mig syg?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Rotter kan b\u00e6re sygdomme, blandt andet leptospirose eller Weils syge, som if\u00f8lge Statens Serum Institut smitter via rotters urin. Undg\u00e5 direkte kontakt med urin, ekskrementer og stillest\u00e5ende vand, og f\u00e5 aktiviteten stoppet hurtigt. I alvorlige, ubehandlede tilf\u00e6lde kan Weils syge v\u00e6re livstruende.\"\n      }\n    }\n  ]\n}<\/script>\n<\/div>\n<aside class=\"rt-contact\">\n  <span class=\"rt-contact-badge\">Giftfri rottebek\u00e6mpelse<\/span><\/p>\n<h3>Har du rotter?<\/h3>\n<p>F\u00e5 en uforpligtende snak om digital, giftfri bek\u00e6mpelse \u2014 vi d\u00e6kker Sj\u00e6lland og Stork\u00f8benhavn.<\/p>\n<p class=\"rt-contact-phone\"><a href=\"tel:+4570200091\">70 20 00 91<\/a><\/p>\n<p class=\"rt-contact-mail\"><a href=\"mailto:info@rattech.com\">info@rattech.com<\/a><\/p>\n<p>  <a class=\"rt-contact-btn\" href=\"\/product\/gennemgang-af-ejendom\/\"><svg width=\"17\" height=\"17\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" aria-hidden=\"true\"><rect x=\"3\" y=\"4\" width=\"18\" height=\"18\" rx=\"2\"\/><path d=\"M16 2v4M8 2v4M3 10h18M9 16l2 2 4-4\"\/><\/svg>Book en ejendomsgennemgang<\/a><br \/>\n<\/aside>\n<\/div>\n<p><script id=\"rt-table-labels\">\n(function(){function go(){document.querySelectorAll('.rt-main table').forEach(function(t){\nvar hs=[].map.call(t.querySelectorAll('thead th'),function(th){return th.textContent.trim();});\nt.querySelectorAll('tbody tr').forEach(function(tr){[].forEach.call(tr.children,function(td,i){if(hs[i])td.setAttribute('data-label',hs[i]);});});});}\nif(document.readyState!=='loading')go();else document.addEventListener('DOMContentLoaded',go);})();\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Har du rotter i k\u00e6lderen eller under gulvet? Se tegnene, hvorfor de kommer op via kloakken, og hvordan du bek\u00e6mper dem giftfrit uden d\u00f8d rotte i v\u00e6ggen.<\/p>","protected":false},"author":7,"featured_media":1173,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3239","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>RatTech<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.rattech.com\/pl\/rotter-i-kaelderen\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:url\" 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