... ,sight glass,manhole cover,cleaning ball,centrifugal pump,pipe holder etc...Advantage: Prompt quotation, competitive price, ... services over 15 years. Occupies area of over 5,000 s.q.m and the new plant ... R & D ability ,there are 105 staffs including 5 senior engineers.Device: YODSN combined CNC turning processing, ... arc welding machine and so on. Stainless steel sanitary union sanitary pipe fittings