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经营范围
发明名称
Steam trap
摘要
申请公布号
US1973259(A)
申请公布日期
1934.09.11
申请号
US19310568815
申请日期
1931.10.14
申请人
NATIONAL CARBON COMPANY, INC.
发明人
KIEFER EDWIN F.
分类号
F16T1/34
主分类号
F16T1/34
代理机构
代理人
主权项
地址
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