{"version":"1.0","provider_name":"Produttore rinomato di grigliati in acciaio cinesi, passerelle portacavi in acciaio inox e ringhiere","provider_url":"https:\/\/www.steelgratingchina.com\/it","author_name":"adminwxzd","author_url":"https:\/\/www.steelgratingchina.com\/it\/author\/adminwxzd\/","title":"Stainless Steel Invisible Manhole Cover - China Steel grating, stainless steel cable tray, railing, well-known manufacturer","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"LEyby8aKfW\"><a href=\"https:\/\/www.steelgratingchina.com\/it\/product\/stainless-steel-invisible-manhole-cover\/\">Stainless Steel Invisible Manhole Cover<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.steelgratingchina.com\/it\/product\/stainless-steel-invisible-manhole-cover\/embed\/#?secret=LEyby8aKfW\" width=\"600\" height=\"338\" title=\"&#8220;Stainless Steel Invisible Manhole Cover&#8221; &#8212; China Steel grating, stainless steel cable tray, railing, well-known manufacturer\" data-secret=\"LEyby8aKfW\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/www.steelgratingchina.com\/wp-includes\/js\/wp-embed.min.js\n<\/script>","thumbnail_url":"https:\/\/www.steelgratingchina.com\/wp-content\/uploads\/2026\/08\/Stainless-Steel-Invisible-Manhole-Cover.webp","thumbnail_width":800,"thumbnail_height":600,"description":"Stainless steel invisible manhole covers are typically pre-embedded in manhole openings, with their frames barely exposed above the ground. Depending on the surrounding environment, various materials can be filled into these stainless steel invisible manhole covers. This allows them to blend seamlessly with the surrounding environment, boasting an aesthetic appearance that makes them hard to spot. Consequently, the risk of theft is effectively reduced."}