- parabolic microphone
- 拋物面: paraboloid
- 反射式: reflection-type; reflecting
- 話筒: microphone; transmitter; spe ...
- 拋物面反射式傳聲器: parabolic microphone; parabolic reflector microphone; parabolic-reflector microphone
- 拋物面反射鏡: parabolic glass reflector; parabolic mirror; paraboloidal reflector
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