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