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发明名称
Sealing ring
摘要
申请公布号
US1921555(A)
申请公布日期
1933.08.08
申请号
US19310532182
申请日期
1931.04.23
申请人
WELSH FRANK J
发明人
WELSH FRANK J.
分类号
A23G9/22
主分类号
A23G9/22
代理机构
代理人
主权项
地址
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