on the first place, a no-car day is supposed to set up every week in our school. because cars not only cause serious air pollution but also waste energy. on no-car day, neither students nor teachers are allowed to drive to school. meanwhile, just walk, jump, cycle or run. use our ...
It consists of tank body, solution heating and cooling device, conductive device, motor, reducer, eccentric disk, connecting rod and pole support roller. The optimum size of the plating bath is of great importance to the growth plan, the estimation of the yield and the quality of the p...