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经营范围
发明名称
TENSION HANGER
摘要
申请公布号
GB8419477(D0)
申请公布日期
1984.09.05
申请号
GB19840019477
申请日期
1984.07.31
申请人
GRAY TOOL CO
发明人
分类号
F16L23/16;E21B33/00;E21B33/03;E21B33/04
主分类号
F16L23/16
代理机构
代理人
主权项
地址
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