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经营范围
发明名称
FLEKSIBEL AKSEL
摘要
申请公布号
NO921710(D0)
申请公布日期
1992.04.30
申请号
NO19920001710
申请日期
1992.04.30
申请人
CANADIAN FRACMASTER LTD
发明人
GODSON, GARY;SIHLIS, LENNHARD
分类号
E21B17/20;F16D3/221;(IPC1-7):E21B/
主分类号
E21B17/20
代理机构
代理人
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