... mainly composed of the pumpbody,the air supply,exhaust system,and one-way valve.It's a use of air pressure to diaphragm ... cement,paper pulp,medicine,chemical industry,dyestuff,dope industry,transport and enviromental protection.Because it's full-enclosed design,will not ... leak.In the rare precious metal smelting,toxic,harmful,corrosive and strong areas of high concentration liquid pump advantage is ...