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摘要
申请公布号
US2203849(A)
申请公布日期
1940.06.11
申请号
US19370142376
申请日期
1937.05.13
申请人
RONALD TRIST ARTHUR
发明人
TRIST ARTHUR RONALD
分类号
B41N1/08;B41N3/00
主分类号
B41N1/08
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