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发明名称
SEALED JOINT
摘要
申请公布号
GB8307403(D0)
申请公布日期
1983.04.27
申请号
GB19830007403
申请日期
1983.03.17
申请人
AVA INTERNATIONAL CORPORATION
发明人
分类号
E21B17/06;E21B23/00;E21B23/02;E21B33/12;E21B43/10;F16J15/32;F16L17/035;F16L37/133;(IPC1-7):E21B33/038
主分类号
E21B17/06
代理机构
代理人
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