· School bus exchanges up to 20% subsidy

The school bus subsidy for redemption implements the purchase price limit. The subsidy pricing standard is divided into three grades: the maximum price of 45-56 seats is not more than 400,000 yuan; the maximum price of 20-45 seat.......

Rotary jet pump works

Rotary jet pump is a new concept pump. Its principle is different from the conventional centrifugal pump. The main working parts of this pump are a rotating rotor and a stationary Biotube. The liquid enters the rotating rotor from the inlet pipe and enters into the casing tube under the act.......

How to extend the life of ceramic valve method

Ceramic valve initially used two-piece structure, in order to more rational structure of the valve into the now commonly used three-piece structure, this structure due to the dual seat, it also has a double seal characteristics. At the same time, the choice of ceramic ball valve attention to ch.......