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摘要
申请公布号
US2145296(A)
申请公布日期
1939.01.31
申请号
US19370159034
申请日期
1937.08.14
申请人
THE WHITEHEAD & HOAG COMPANY
发明人
DRAPER HAROLD W.;DAY JAMES C.
分类号
A44C3/00
主分类号
A44C3/00
代理机构
代理人
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