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发明名称
ROCK BIT
摘要
申请公布号
JPS6153989(A)
申请公布日期
1986.03.18
申请号
JP19840173353
申请日期
1984.08.22
申请人
KAWASAKI HEAVY IND LTD
发明人
TSUGAKI SHOICHIRO;MIYASAKA TOMOO;NISHIYAMA YUKIO;ATSUTA TOSHIO
分类号
E21B10/22;E21B10/08
主分类号
E21B10/22
代理机构
代理人
主权项
地址
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