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发明名称
DRILLING APPARATUS FOR POSITIVE AND REVERSE IMPACTION
摘要
申请公布号
JPS5858392(A)
申请公布日期
1983.04.06
申请号
JP19810157702
申请日期
1981.10.03
申请人
TOYO KOGYO KK
发明人
ISHII NOBORU;FUJIKAWA KOUZOU;YASUMORI TOSHIYUKI
分类号
E21B44/00;E21B1/00
主分类号
E21B44/00
代理机构
代理人
主权项
地址
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