英文關鍵字
ultrasonic
dentist
plaque
tartar
cleaning
oral
teeth
ultrasound
medical
procedure
treatment
clinic
medicine
instrument
stomatology
caries
gingivitis
prevention
closeup
scaler
英文關鍵字
ultrasonic
dentist
plaque
tartar
cleaning
oral
teeth
ultrasound
medical
procedure
treatment
clinic
medicine
instrument
stomatology
caries
gingivitis
prevention
closeup
scaler