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| 按钮板; 按钮台; 按钮位置 | |||
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| 按钮控制站 | |||
| 按钮站 | |||
| 按钮台; 控钮站 | |||
| 按键式电话可用按键向电话局发送双音多频数字信令 | |||
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push -button station : 3 phrases in 2 subjects |
| Electronics | 2 |
| Oil / petroleum | 1 |
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