试题详情

A①:DN100mm,AB:DN225mm,BC:DN150mm,CD:DN125mm

B①:DN100mm,AB:DN150mm,BC:DN125mm,CD:DN100mm

C①:DN100mm,AB:DN200mm,BC:DN150mm,CD:DN125mm

D①:DN125mm,AB:DN200mm,BC:DN150mm,CD:DN125mm