Two fall arrestors and handrails on all walkways.
两套防坠落装置，所有通道均有扶手。
Current collectors, Junction boxes, Couplers, Electrical insulators, Brake systems, Surge arrestors.
电流收集器，接线盒，耦合器，电绝缘体，刹车系统，浪涌捕获器。
A series of 6 lightning surge arrestors at corners between each pole and the earth and the various gauges.
在角落系列6雷电避雷器之间每极与地球和各种仪表。
The fact shows that the designed circuits can be used in impulse current test for arrestors, varistors and SPD.
实践证明：按照上述原则设计的回路可用于对避雷器阀片、压敏电阻及浪涌保护器SPD进行冲击电流检测。
In addition, various pilot lights, lightning arrestors, phase protectors and intrinsically safe relays are available as modifications.
此外，作为改型件，还可提供各种指示灯，避雷器，相位保护器和安全火花继电器。
Types of fire arrestor and work principles are described. Combined with national standards and professional standards, procedures to select fire arrestors and points to be noticed are analyzed.
介绍了阻火器的类型与阻火原理，结合有关国家标准和行业标准论述了选用阻火器的步骤和注意事项。
Types of fire arrestor and work principles are described. Combined with national standards and professional standards, procedures to select fire arrestors and points to be noticed are analyzed.
介绍了阻火器的类型与阻火原理，结合有关国家标准和行业标准论述了选用阻火器的步骤和注意事项。
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