channel with trapezoidal section  梯形断面排水沟

open trapezoidal Channel  梯形明渠

trapezoidal channel with an arc slope angle  弧形坡脚梯形渠道

trapezoidal open channel  梯形明渠; 梯形断面明渠

trapezoid canal with arc-bottom  弧底梯形渠道

box girder with trapezoidal section  梯形截面箱梁

open trapezoidal canal  梯形明渠

Rib optical waveguide with trapezoidal cross section  梯形截面脊形光波导

trapezoidal channel  梯形渠道; 梯形渠; 梯形明渠

Waveguide with trapezoidal cross section  梯形波导

(pressure)gauge with bottom connection  径向压力表

axial channel with deepwater acoustic track  深海声道轴信道

Boreholes on Circular Arc with Inclined Plane  定向井

carbonate oil reservoir with bottom water  底水碳酸盐岩油藏

channel with compound section  复式断面渠道

channel with compound sections  行洪能力; 卫生纸收集箱

channel with concrete lining  衬砌渠道

channel with crosscurrent  横流通道

channel with crossflow  横流通道