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舞台设备及机械Stage Machinery B搬运车Dolly truck运送舞台装置及物品的工具车或折叠车。保护接地Protectiv eearthing将电气设备的金属外壳与接地体连接,当电气设备的绝缘体损坏使外壳带电时,将漏电体钳制与大地形成等电
Stage Equipment and Machinery Stage Machinery B Dolly Truck A transport or folding trolley to transport stage equipment and objects. Protective earthing Protectiv eearthing Connect the metal casing of the electrical equipment with the earthing body. When the electrical equipment insulator is damaged and the casing is live, clamp the earthing body with the earth to form an isoelectric