发明名称 |
|
摘要 |
|
申请公布号 |
BE726211(A) |
申请公布日期 |
1969.05.29 |
申请号 |
BED726211 |
申请日期 |
1968.12.27 |
申请人 |
|
发明人 |
|
分类号 |
G03B17/52 |
主分类号 |
G03B17/52 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|
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