梯形断面水面线
water surface profiles of trapezoid
圆形断面管道
pipeline with circular section
Morris圆形水迷宫
rounded Morris water maze
变截面圆形管道
circular cross-section tube with constriction
定直径圆断面
a circular section with fixed diameter
非圆断面
noncircular cross section
非圆断面蜗壳水力设计
hydraulic design of spiral case with non-circular
截断圆形波导
truncated circular wave guide
矩形-圆形波导转换器
rectangular-circular waveguide transducer
无芯平面圆形螺旋电感
cureless planar circular spiral inductor