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发明名称
PIPE THREAD PROTECTOR
摘要
申请公布号
CA316280(A)
申请公布日期
1931.10.20
申请号
CAD316280
申请日期
申请人
HERMAN ALBERT UNKE
发明人
HERMAN ALBERT UNKE
分类号
主分类号
代理机构
代理人
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