This refers to the use of a miniature BTE hearing aid that is coupled to an ear insert or earmold (vented or unvented) via a tubing of approximately 0.8 mm inner diameter.
助听器用一根内径大约0.8毫米的细导管耦合到塞或者模（模可以开或者不开通气孔）的验配方。
This refers to the use of a miniature BTE hearing aid that is coupled to an ear insert or earmold (vented or unvented) via a tubing of approximately 0.8 mm inner diameter.
助听器用一根内径大约0.8毫米的细导管耦合到塞或者模（模可以开或者不开通气孔）的验配方。
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