1. The power cord uses a soft cable -type power supply to access.

2. The mechanical components take explosion -barrier measures to prevent the electric gourd from running and produce high temperature sparks, and the relevant components are treated.

3. In order to prevent sparks, an appropriate amount of mechanical oil should be injected into the lifting and running reducer; the roll, the wire rope, the hook pulley bearings, the wheels, the lifting, and the running motor must also be painted; The limiter of the left and right stops and the limiter is made of bronze or stainless steel.