Shanghai Maojin Dao Electronic Technology Co., Ltd.  

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Electrostatic grounding emergency signal device, electrostatic grounding clamp, human-body static discharge column, human-body static elimination column, anti-static grounding electrode, intrinsically safe human-body static discharge emergency signal instrument, automatic cable-retracting electrostatic grounding emergency signal device, electrostatic grounding controller, anti-static overfill protection device, anti-static overfill detection instrument, high-level liquid level emergency signal instrument.