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发明名称
Liner washer
摘要
申请公布号
US2042817(A)
申请公布日期
1936.06.02
申请号
US19340706380
申请日期
1934.01.12
申请人
WILCOX JOHN A
发明人
WILCOX JOHN A.
分类号
E21B37/08
主分类号
E21B37/08
代理机构
代理人
主权项
地址
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