倒梯形脊波导
anti-trapezoid ridge waveguide
长梯形截面钢板
long trapezoidal cross-section steel sheet
刚塑性阶梯形截面悬臂梁
rigid plastic stepped cantilever beams
阶梯折射率剖面光波导
step graded index lightguide
梯形波导
Waveguide with trapezoidal cross section
梯形脊形金属波导
trapezoidal-ridge metal waveguide
梯形截面
trapezoid cross section
ladder section
trapezoidal cross section
梯形截面通道
Passage with trapezoid cross-section
梯形截面箱梁
trapezoidal box section girder
box girder with trapezoidal section
非对称脊形波导
Asymmetric ridge waveguide