ear trumpet

... 助推火箭：booster rockets 助听筒：ear trumpet 助听器放大器：hearing aid amplifier ...

 otacousticon

... otacoustic助听的 otacousticon助听筒 otaphone①助听器②耳听诊管 ...

 hearing trumpet

... joint hearing 会审 ; 会同审理或审判 hearing trumpet 助听筒 hearing room 审讯室 ; 测听室 ...

 hearing horn

... healthy scissors 卫生剪 hearing aid 助听器 hearing horn 助听筒 ...