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发明名称
Device for the automatic adjustment of the tensions of films
摘要
申请公布号
US1786917(A)
申请公布日期
1930.12.30
申请号
US19270211803
申请日期
1927.08.09
申请人
ETIENNE OEHMICHEN
发明人
OEHMICHEN ETIENNE
分类号
G03B1/42
主分类号
G03B1/42
代理机构
代理人
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地址
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