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发明名称
File follower
摘要
申请公布号
US2693192(A)
申请公布日期
1954.11.02
申请号
US19490125551
申请日期
1949.11.04
申请人
JAMES-POND-CLARK
发明人
JAMES RALPH W.
分类号
B42F17/02
主分类号
B42F17/02
代理机构
代理人
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