The Secondary Element in the Network of Hydrostatic Transmission with Secondary Regulation is a kind of advanced technique with good control and application properties, it has extensive prospect in the energy conversation application. From these characteristics, this paper presents several kinds of energy-saving and reuse of Energy technologies with Secondary Regulation, comprehensively analyzes and explains its’ application prospects and research directions in Hydraulic Elevator System.

A belt conveyor is a kind of major equipment to carry loose materiel and is widely used in industries such as mine port, metallurgy, etc. for its numerous advantages. But Because of the influence of belt itself and outside factor, the accident that the belt is cut off often appears, which make a grate threat for safe production. Gives detail introduction to several types of broken belt protectors used in home, analyzes its working principle and advantages and disadvantages, provide certain reference for the user choice.