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发明名称
Printing roller
摘要
申请公布号
US2270436(A)
申请公布日期
1942.01.20
申请号
US19400348639
申请日期
1940.07.31
申请人
HART WILLIAM C
发明人
HART WILLIAM C.
分类号
B41N7/00
主分类号
B41N7/00
代理机构
代理人
主权项
地址
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