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摘要
申请公布号
US1967453(A)
申请公布日期
1934.07.24
申请号
US19330690824
申请日期
1933.09.25
申请人
MAX SCHOENING
发明人
SCHOENING MAX
分类号
G09F7/02
主分类号
G09F7/02
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