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GND: This pin is the combined control circuitry and power ground.
该引脚是综合控制电路和电源地。
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Remove the control box to the ground near the power supply, which can reduce the circuitry voltage drop and avoid the effect of vibration.
将控制箱移至地面靠近电源处，减小了线路电压降，避免了震动影响。
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模块上移
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