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发明名称
Film feed
摘要
申请公布号
US2301054(A)
申请公布日期
1942.11.03
申请号
US19400368483
申请日期
1940.12.04
申请人
LAING TORRANCE R
发明人
LAING TORRANCE R.
分类号
G03B17/53
主分类号
G03B17/53
代理机构
代理人
主权项
地址
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