| 发明名称 |
EXTENSION MUTUAL CONNECTION SYSTEM |
| 摘要 |
PURPOSE:To make a single channel of the extension mutual communication trunk in order to half the number of output terminals, thereby increasing their number in terms of practical effect and ensuring economical switch board operation. |
| 申请公布号 |
JPS5210607(A) |
申请公布日期 |
1977.01.27 |
| 申请号 |
JP19750087120 |
申请日期 |
1975.07.16 |
| 申请人 |
TAIKOU DENKI SEISAKUSHIYO KK |
发明人 |
KUROMORI HIROSHI |
| 分类号 |
H04Q3/54;H04Q3/00;H04Q3/58 |
主分类号 |
H04Q3/54 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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