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经营范围
发明名称
PHOTOOPTICAL CURTAIN
摘要
申请公布号
PL118202(B2)
申请公布日期
1981.09.30
申请号
PL19780211433
申请日期
1978.12.01
申请人
发明人
分类号
F16P;F16P3/14;(IPC1-7):F16P3/14
主分类号
F16P
代理机构
代理人
主权项
地址
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