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发明名称
PIPE-ENGAGING MECHANISM
摘要
申请公布号
SU1430497(A1)
申请公布日期
1988.10.15
申请号
SU19874167494
申请日期
1987.12.24
申请人
VNI PK I NEFTYANOGO MASHINOSTROENIYA
发明人
KALABALYK ANATOLIJ V,SU;DRUTSKIJ VALERIJ G,SU
分类号
E21B19/10;E21B19/00
主分类号
E21B19/10
代理机构
代理人
主权项
地址
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