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摘要
申请公布号
US1973020(A)
申请公布日期
1934.09.11
申请号
US19340707954
申请日期
1934.01.23
申请人
SMITH RICHARD L
发明人
SMITH RICHARD L.
分类号
A47G29/122
主分类号
A47G29/122
代理机构
代理人
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