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发明名称
Shock absorber for oil-well pump rods
摘要
申请公布号
US1750917(A)
申请公布日期
1930.03.18
申请号
US19280310633
申请日期
1928.10.05
申请人
BAKER FRANK C
发明人
BAKER FRANK C.
分类号
F04B53/14
主分类号
F04B53/14
代理机构
代理人
主权项
地址
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