1.0OSSAhttps://ossaint.com/en/rich600338<blockquote class="wp-embedded-content" data-secret="I6bEpAhX2W"><a href="https://ossaint.com/en/saudi-arabia-2-2/">El Duranguense Tunnel (Mexico).</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://ossaint.com/en/saudi-arabia-2-2/embed/#?secret=I6bEpAhX2W" width="600" height="338" title="“El Duranguense Tunnel (Mexico).” — OSSA" data-secret="I6bEpAhX2W" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !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); </script> https://ossaint.com/wp-content/uploads/2024/08/Barrenacion-pernos.jpg18651050This video shows the progress of the El Duranguense road tunnel, which OSSA is building in Durango (Mexico). It involves the extension of the section of an existing tunnel of 515 metres in length (going from a 5×5 metre section to a 12×8 metre section). The excavation is carried out entirely with drilling and blasting, […]