fan motor switch的意思|示意

Our company specializes in manufacturing and marketing electric motor, reducer, axial fan, fan motor, water pump, blower, capacitors, switch, thermostat, timer and refrigeration parts.

我司专业生产和销售电机，减速机，轴流风机，风扇电机，水泵，风机，电容器，开关，温控器，定时器和制冷配件。

In the video the fan is switched off while travelling upwards with the new red switch to allow hearing of the propulsion motor but the sound is not really audible.

片段当中的风扇在上行时用那个红色的新开关掣关掉，以便聆听驱动机芯，但声音不算真的可以听到。