英文關鍵字
blue
caucasian
closeup
compex
electro
electrodes
macro
movement
quadriceps
red
shaking
skin
square
starting
stimulation
working
英文關鍵字
blue
caucasian
closeup
compex
electro
electrodes
macro
movement
quadriceps
red
shaking
skin
square
starting
stimulation
working