Use ear endoscopy to clean the external auditory canal and tympanic membrane patchy attachments
13:03
Two types of cholesteatoma surgery and natural destruction in the middle ear, 12 minutes
14:07
Using metal instruments on the tympanic membrane surface, non-professionals should not imitate
33:45
Why It Was Almost Impossible to Make the Blue LED
10:31
Endoscopic ear treatments by Dr Zhao EP.40- 09/07/2020
46:22