A down-the-hole drill, usually called DTH by most professionals, is basically a screwed on the bottom of a . The fast hammer action breaks hard rock into small cuttings and dust that are evacuated by a fluid (air, water or ). The DTH hammer is one of the fastest ways to drill hard rock. The system is thought to have been invented independently by Stenuic.
[pdf] When set to local, the remote switch cannot start or stop the air compressor. When set to remote, both the remote switch and the local switch can start or stop the air compressor.
[pdf] In this video, you're watching a 13-ton Bach mixer being lifted from the main deck of a drilling rig to a supply vessel, using a pedestrian crane in open sea conditions. This isn't just about moving heavy equipment—it's about trust, timing, and teamwork.
[pdf] 
