... card sleeve elbow,double bearing the bend, flange elbow, reducer elbow, tooth bend, stamping elbow inside andoutside screw, pushing ... inspection systems, mainly manufacture elbow, tee, reducer, cap, flange, cross, nipple, socket fitting, expansion joint and other series products. ... valves, eject valves and knife gate valves &Valve pipe fitting. Through years’ development and innovation, the company is ...