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发明名称
Sand trapping sucker-rod for piston type oil well pump
摘要
申请公布号
US3090324(A)
申请公布日期
1963.05.21
申请号
US19600057661
申请日期
1960.09.22
申请人
SCHMIDT BENJAMIN F
发明人
SCHMIDT BENJAMIN F.
分类号
F04B47/00
主分类号
F04B47/00
代理机构
代理人
主权项
地址
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