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| 步进选择器 | |||
| 步进［式］开关 | |||
| 步进式交换机 | |||
| 步进制开关; 步进式开关; 步进式交换; 步进开关; 史端乔式开关 | |||
| 步进式机键; 步进式交换器 | |||
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| 进步式开关 | |||
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step -by-step switch : 1 phrase in 1 subject |
| Technology | 1 |
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