LUCKNOW, India (AP) — Rescuers drilled deeper into the rubble of a collapsed road tunnel in northern India on Friday to fix wide pipes for 40 workers trapped underground for a sixth day to crawl to ...

Thermal drilling relies on friction from a carbide bit to melt and extrude metal and form a hole. The process leaves a thicker lip around the edges of holes than with conventional drilling, providing ...

Many types and sizes of drilling machines are used in manufacturing. They range in size from a simple bench mounted sensitive drill press to the large multiple-spindle machines able to drive many ...

People watch rescue and relief operations at the site of an under-construction road tunnel that collapsed in mountainous Uttarakhand state, India, Wednesday, Nov. 15, 2023. Rescuers have been trying ...