| 摘要 |
PCT No. PCT/IB97/00151 Sec. 371 Date Nov. 16, 1998 Sec. 102(e) Date Nov. 16, 1998 PCT Filed Feb. 20, 1997 PCT Pub. No. WO97/31176 PCT Pub. Date Aug. 28, 1997A shank adapter for a rock drill, which is used to connect one end of a drill string to a rock drill, has a chuck end (10) made from one piece of material and an opposite, threaded end (16) made from another, different, material. The chuck end and the threaded end are permanently joined to one another in one stage of manufacturing. |
