... maintain, 2.Microprocessor control, which indicates the speed, time, RCF in operation, speed rising and reducing quick, operate simply. 3.Automatic ... 4.Electronic lock, the lid can open in order to protect the operator in operation.5.Over speed and imbalance protection, ... 3 tiers protection steel cover, 10 kinds of program stored in the memory, 10 kinds of accelerating and decelerating speed for your ...