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| 遮光器 | |||
| 光斩波器; 光断续器 | |||
| 斩光盘; 光调制盘 | |||
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| 光斩波器; 光断续器 | |||
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optical chopper : 4 phrases in 2 subjects |
| General | 1 |
| Technology | 3 |
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