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发明名称
Seal
摘要
申请公布号
US2203163(A)
申请公布日期
1940.06.04
申请号
US19380211346
申请日期
1938.06.02
申请人
LEONARD JR SIMPSON C
发明人
JR. SIMPSON C. LEONARD,
分类号
F16J15/32
主分类号
F16J15/32
代理机构
代理人
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