英文關鍵字
abstract
action
background
blue
clockwork
cogwheel
gear
gears
gearshift
industrial
loop
macro
mechanical
mechanics
mechanism
orange
pinion
rotating
shot
transmission
turning
英文關鍵字
abstract
action
background
blue
clockwork
cogwheel
gear
gears
gearshift
industrial
loop
macro
mechanical
mechanics
mechanism
orange
pinion
rotating
shot
transmission
turning