波导截止频率
waveguide cutoff frequency
截止波导衰减器
cutoff waveguide attenuator
槽状波导截面
channel waveguide cross sections
差压式截止止回阀
differential stop check valve
单模光纤截止波长
cutoff wavlength of single-mode fiber
短波截止滤波器
short wave cut-off filter
基模截止波长
Fundamental mode cutoff wavelength