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发明名称
Method of making an oil seal
摘要
申请公布号
US2122477(A)
申请公布日期
1938.07.05
申请号
US19350034548
申请日期
1935.08.03
申请人
LEONARD JR SIMPSON C
发明人
JR. SIMPSON C. LEONARD,
分类号
B21D39/02
主分类号
B21D39/02
代理机构
代理人
主权项
地址
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