A 35 lb (156 N) force was applied for a period of 1 min to the supply cord at the strain relief in a direction to cause the greatest movement of the cord.
用35英镑（156牛顿）的同方向拉力作用于出气冒口的电源线，维持一分钟，从而使电源线的移动行程最大。
Note: The power supply shall be test at max AC voltage (270Vac) and min load or no load.
应该在最大交流输入电压270伏和轻载，空载下测试。
This series timers adopt high accurate synchromotor as power source and take power supply frequency as time datum. There are many specifications in time setting from 30 min. to 24 hours.
该系列定时器采用高精度同步电机为动力源，以电源频率为时间基准，在30分钟至24小时内有多种规格的定时范围。
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