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发明名称
PUMP JACK
摘要
申请公布号
CA303289(A)
申请公布日期
1930.08.26
申请号
CAD303289
申请日期
申请人
WILLIAM GEORGE BEATTY
发明人
WILLIAM GEORGE BEATTY
分类号
主分类号
代理机构
代理人
主权项
地址
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