උමං හාරණ මැෂින් වැඩ කරන හැටි Tunnel boring machine (TBM)- |SL eTV

Tunnel boring machine (TBM)- Sinhala Review |SL eTV Doppelschild TBM උමං කණින යන්ත්‍ර Tunnel boring machine (TBM) Tunnal boring in not new to Srilankens. There were many done by drill and blast method. But the modern system is using TBM for tunneling. Fair use. Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use. No copyright infringement intended.