Results 191 to 200 of about 2,570 (205)

Welker's Percussion Rock-Drill

Scientific American, 1883
openaire   +1 more source

percussive core drilling

2014
openaire   +1 more source

rotary percussive drill

2014
openaire   +1 more source

rotary percussion drilling

2014
openaire   +1 more source

Improving Drilling Technology in Percussive Rotary Drilling

Journal of Superhard Materials
Ye. A. Koroviaka, S. O. Shypunov
openaire   +1 more source

dry percussion drilling

2014
openaire   +1 more source

percussion drilling equipment

2014
openaire   +1 more source

Application of Percussive-Rotary Drilling Technology in Petroleum Drilling

Foreign Language Science and Technology Journal Database Engineering Technology, 2021
openaire   +1 more source

New concepts in percussive drilling

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1993
openaire   +1 more source

rotary-percussion drilling equipment

2014
openaire   +1 more source