英文關鍵字
angles
animation
background
camera
circle
clock
clockwork
close
closeup
cog
cogwheel
concept
design
detail
different
engine
engineering
equipment
gear
gears
gold
industrial
industry
inside
iron
machine
machinery
macro
mechanic
mechanical
mechanics
mechanism
metal
metallic
old
part
piece
power
precise
precision
retro
rotating
rotation
round
shaft
shape
spare
steel
teamwork
tech
technical
technology
time
timepiece
transmission
vehicle
vintage
wheel
work