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经营范围
发明名称
Steam trap
摘要
申请公布号
US1807882(A)
申请公布日期
1931.06.02
申请号
US19300431847
申请日期
1930.02.27
申请人
SMELSER DAVID A
发明人
SMELSER DAVID A.
分类号
F16T1/26
主分类号
F16T1/26
代理机构
代理人
主权项
地址
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