2T Electric Chain Hoist Capacity:2ton Lifting speed:6.8m/min Voltage:200-700V Frequence:50Hz/s 1. Electric motor partial outer coverThey are ... , Fast release heat, Continuous use, Enclosed structure. Can be used in the chemical plants, electroplating factories, and other places. 2 ... heat treatment alloy steel. Advatages: It is safely approximately when used in the rain water, the sea water, under the ...