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71. | Time switch |
| 计时开关 |
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72. | discharge switch |
| 放电开关 |
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73. | displacement switch |
| 位移开关 |
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74. | switch decomposition |
| 开关分解 |
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75. | threshold switch |
| 阈值开关 |
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76. | magnetic switch |
| 磁力开关 |
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77. | pull-chain operator |
| 拉链开关 |
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78. | switch on; turn on |
| 打开开关 |
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79. | pull-rod operator |
| 拉杆开关 |
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80. | switch modulation |
| 开关调制 |
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