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| 21. | In computer security a manually operated switch or device that activates an alarm. |
| 计算机安全学中，指手工操纵的能发生警报的开关或设备。 |
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| 22. | system should be added for the inflammable gas storage area as well as a flameproof machine, a pressure alarm |
| 增加排气系统（顾事故通风）易燃气体放置区域采用防爆风机，并配置灭火器。并且气瓶柜需要自动防爆、力报警装置，气瓶柜需要事故排风装置。 |
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| 23. | "An alarm device is a type of device that emits audible or visible indications related to a problem situation |
| "警告设备是一种就出现的问题发出声响或可见标志的设备。 |
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| 24. | The Breaker can be attached with shunt tripping device, undervoltage tripping device, auxiliary contacts |
| ●断路器可以加装分励脱扣器、压脱扣器，辅助触头，报警触头和电动操作机构。 |
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| 25. | An automatic sensing device that activates an alarm or extinguisher in case of fire. |
| 火灾自动警报或灭火器在火灾时激活警报或灭火器的自动测向装置 |
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| 26. | Safety device containing an audible alarm will break the circuit automatically when the pump is overloaded |
| 设想周到的各种电子保护装置，如无熔丝开关，缺水或缺油，温度异常及泵浦过负荷等自动警示系统，回路能自动切断，确保安全。 |
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