... use/purpose can be divided into: the groove elbow, card sleeve elbow,double bearing the bend, flange elbow, reducer ... tooth bend, stamping elbow inside andoutside screw, pushing elbow, socket elbow ,butt weld elbow,inside screw elbow. Our elbow through ... , mainly manufacture elbow, tee, reducer, cap, flange, cross, nipple, socket fitting, expansion joint and other series products. elbow:are widely ...