The paper lists power switches, specifications of power supply line and power supply distance under specified voltage loss for commonly-used elevators.

对常用的几种电梯列表给出电源开关、供电线路规格和在规定的电压损失下的供电距离。

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This tester is to test the damaged degree of conductor or various materials of insulator caused by the specified voltage to ensure the security of usage of insulating material.

本机在测试导体或各种材料耐电压破坏强度，以确保绝缘材料使用之安全性。

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We have a lot of parameters to choose transistor, but when we use it in controlled rectification, the specified electric current and the specified voltage are the principal ones.

晶闸管的选择参数很多，但用于可控整流时，主要是额定电流、额定电压的计算与选择。

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