发明名称 |
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摘要 |
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申请公布号 |
DE1529288(U) |
申请公布日期 |
1943.02.17 |
申请号 |
DE194100A1786U |
申请日期 |
1941.10.07 |
申请人 |
|
发明人 |
|
分类号 |
G04B17/22 |
主分类号 |
G04B17/22 |
代理机构 |
|
代理人 |
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主权项 |
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地址 |
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