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发明名称
ROCK DRILL
摘要
A rock drill assembly and more particularly a rock drill assembly having improved fluid power means therefor.
申请公布号
ZA7701682(B)
申请公布日期
1978.02.22
申请号
ZA19770001682
申请日期
1977.03.21
申请人
JOY MFG CO
发明人
MORRISON W
分类号
E21B19/08;B25D9/12;E21B6/00;E21B44/06
主分类号
E21B19/08
代理机构
代理人
主权项
地址
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