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| 郊区自动电话交换机; 郊区自动电话局 | |||
| 单位内部自动电话交换机 | |||
| 小型自动电话交换台; 自动电话交换设备; 内部自动电话交换机 | |||
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| 自动电话交换机 | |||
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unit automatic exchange : 1 phrase in 1 subject |
| Metallurgy | 1 |
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