英文關鍵字
animated
animation
background
broken
brown
circle
cog
cogwheel
design
desk
dirty
equipment
few
gear
group
industrial
industry
isolated
large
loop
looping
machine
machinery
material
mechanical
mechanism
motion
move
natural
old
pine
plank
plywood
rotate
rotation
seamless
spin
spinning
surface
texture
transmission
turning
unique
wheel
wheels
wood
wooden
worn