同义词
1)reducing cross (reducing on both outlet),异径四通(两个分支口为异径)2)reducing cross (reducing on one run and both outlet),异径四通(一个直通口及两个分支口为异径)3)reducing cross (reducing on one run and outlet),异径四通(一个直通口及分支口为异径)4)reducing cross (reducing on one outlet),异径四通(一个分支口为异径)5)reducing tee (reducing on one run and outlet),异径三通(一个直通口及分支口为异径)6)reducing tee (reducing on outlet),异径三通(分支口为异径)
