in the ear(hearing aid)

耳背式助... ... ) ear level hearing aid 耳级助听器 ) in-the-ear hearing aid 耳内助听器 ) behind-the-ear aid 耳背式助听器 ...

in hearing是什么意思_in... ... in-the-ear hearing aid1. 耳内式助听器 in-the-canal hearing aid1. 耳道式助听器 ...