... design, higher efficiency, longer operating life Introduction of GM-0.50“Jinteng”GM-0.50 diaphragm vacuum pump is designed and ... “Jinteng”GM-0.50 diaphragm vacuum pump is made of aluminum alloy through die casting. It is antiseptic, sprayed, agile and beautiful ... . It has the features of higher antisepsis, wider working range. It can meet requirements of all kinds of working environments. GM ...