1. In addition to the electric hoist operated on the ground, all other types of electric crane equipment should be equipped with audio signal devices, and the passenger elevators should be equipped with audible alarm devices.2. The three-phase main line of the electric crane should be equipped with indicator lights, the color is yellow, green and red. When the rail length is >50m, the indicator light should be set at both ends of the sliding line, and the driver's room power supply indicator should be set under the main power knife switch.3. Electric crane driver cabin lighting should u ...
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