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发明名称
EXPANDERS FOR DUCTILE METAL PIPES AND TUBES
摘要
申请公布号
CA491437(A)
申请公布日期
1953.03.17
申请号
CAD491437
申请日期
申请人
WILLIAM R. CHAMPION
发明人
WILLIAM R. CHAMPION
分类号
主分类号
代理机构
代理人
主权项
地址
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