After uncovering of treble part we see valves underlaid by felt.

在揭露高音部分以后我们看见持的阀门。

Objective: To estimate and compare the therapy effects of tympanoplasty between oversleeve sandwich method and underlay method.

比较单纯鼓膜修补术的袖套夹层法和与内植法的疗效。