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摘要
申请公布号
US2159697(A)
申请公布日期
1939.05.23
申请号
US19370177101
申请日期
1937.11.29
申请人
HARDY DONOVAN H
发明人
HARDY DONOVAN H.
分类号
B41K1/08
主分类号
B41K1/08
代理机构
代理人
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