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发明名称
DRILL JUMBO
摘要
申请公布号
JPS5513366(A)
申请公布日期
1980.01.30
申请号
JP19780086373
申请日期
1978.07.14
申请人
YAMAUCHI KOGYO KK
发明人
YAMAUCHI NORIO
分类号
E21B7/02;E21B15/00;E21B19/08
主分类号
E21B7/02
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代理人
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地址
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