l 1.2 管件 Fitting弯头 elbow异径弯头 reducing elbow带支座弯头 base elbowk半径弯头 long radius elbow短半径弯头 short radius elbow长半径180弯头 long radius return短半径180弯头 short radius return带侧向口的弯头(右向或左向) side outlet elbow (right hand or left hand)双支管弯头(形) double branch elbow三通 tee异径三通 reducing tee等径三通 straight tee带侧向口的三通(右向或左向) side outlet tee (right hand or 1eft hand)异径三通(分支口为异径) reducing tee (reducing on outlet)异径三通(一个直通口为异径)reducing tee (reducing on one run)带支座三通 base tee异径三通(一个直通口及分支口为异径) reducing te