Y-type pipe叉管
Y-pipe e三通管
Y-pipe Y形接管
y-shaped pipey形管
crescent ribbed y-pipe内加强月牙肋岔管
steel y-pipe with crescent rib月牙肋钢岔管
Y-shaped branch pipeY型分支管
Y-type bifurcation pipeY形岔管
asymmetrical Y-shaped bifurcated pipe卜型岔管