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| 程控电话交换机 | |||
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| 程控电话交换机 | |||
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program controlled telephone switching : 4 do fraz, 2 tematyki |
| Kolejnictwo | 1 |
| Technika i technologia | 3 |
|
| |||
| 程控电话交换机 | |||
| |||
| 程控电话交换机 | |||
|
program controlled telephone switching : 4 do fraz, 2 tematyki |
| Kolejnictwo | 1 |
| Technika i technologia | 3 |