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| 51. | sonar pinger |
| 声纳脉冲发射器 |
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| 52. | plate-pulsed transmitter |
| 板极脉冲调制发射器 |
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| 53. | life throwing appliance |
| 救生索发射器 |
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| 54. | alarm sender circuit |
| 警报发送器电路 |
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| 55. | grenade launcher cartridge |
| 榴弹发射器榴弹 |
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| | |
| 56. | semiconductor laser transmitter |
| 半导体激光发射器 |
|
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| 57. | infrared projector |
| 红外线信号发射器 |
|
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| | |
| 58. | engine unit sender |
| 发动机组传感器 |
|
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| | |
| 59. | vertical-loop transmitter |
| 垂直线圈发射器 |
|
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| 60. | multi-class sender |
| 万用记发器 |
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