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发明名称
摘要
申请公布号
DE3235845(C2)
申请公布日期
1986.04.17
申请号
DE19823235845
申请日期
1982.09.28
申请人
CANADIAN FRACMASTER LTD., CALGARY, ALBERTA, CA
发明人
BULLEN, RONALD S.;LILLIES, ALLAN T., CALGARY, ALBERTA, CA
分类号
B62B1/18;E21B36/00;E21B43/26;E21B43/267;(IPC1-7):E21B43/267
主分类号
B62B1/18
代理机构
代理人
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地址
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