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经营范围
发明名称
Well flowing device
摘要
申请公布号
US2184636(A)
申请公布日期
1939.12.26
申请号
US19380220608
申请日期
1938.07.22
申请人
MERLA TOOL COMPANY
发明人
CRICKMER CHARLES S.;GLITSCH HANS C.
分类号
F04F1/18
主分类号
F04F1/18
代理机构
代理人
主权项
地址
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