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发明名称
FORMATION OF FEMALE SCREW SECTION IN BORING ROD FOR PERCUSSION BORING
摘要
申请公布号
JPH0480497(A)
申请公布日期
1992.03.13
申请号
JP19900195184
申请日期
1990.07.24
申请人
KOUKEN KOUGIYOU KK
发明人
KINOSHITA KAZUHISA;ENDO TETSUYA
分类号
E21B17/02;B23G1/02
主分类号
E21B17/02
代理机构
代理人
主权项
地址
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