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经营范围
发明名称
Steam engine
摘要
申请公布号
US1798816(A)
申请公布日期
1931.03.31
申请号
US19200385544
申请日期
1920.06.01
申请人
STEVENS ROBERT C
发明人
STEVENS ROBERT C.
分类号
F01B17/04
主分类号
F01B17/04
代理机构
代理人
主权项
地址
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