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发明名称
BOREHOLE PLUG
摘要
申请公布号
GB2076446(B)
申请公布日期
1983.09.07
申请号
GB19810011908
申请日期
1981.04.15
申请人
THERMOPLAST & APPARATEBAU GMBH
发明人
分类号
E21B33/127;E21B34/06;E21F17/00;(IPC1-7):E21D21/00
主分类号
E21B33/127
代理机构
代理人
主权项
地址
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