E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 6/00 (2006.01) E21B 17/03 (2006.01) E21B 17/042 (2006.01)
Patent
CA 2314834
A shank adapter 12 for rock drilling is provided with an end form 50,58 which can accept either a drill rod or a rock bolt, making the same adapter usable for drilling and for rock bolting.
Marklund Jan
Nordin Olof
O'brien John
Boart Longyear Limited
Jama Mining Equipment Ab
Marks & Clerk
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