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发明名称
Means for supporting sucker rod and pump lines
摘要
申请公布号
US1810303(A)
申请公布日期
1931.06.16
申请号
US19280287076
申请日期
1928.06.21
申请人
STOKES JOHN C
发明人
STOKES JOHN C.
分类号
E21B23/02
主分类号
E21B23/02
代理机构
代理人
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地址
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