英文關鍵字
antique
background
car
checks
circle
clock
close
closeup
cogs
cogwheel
design
detail
details
dirty
engine
engineering
equipment
footage
gear
gearbox
gears
industrial
industry
iron
machine
machinery
manufacturing
mechanic
mechanical
mechanism
metal
metallic
motor
move
moving
object
occupation
old
part
power
retro
rust
rusty
shot
steel
technical
technology
tool
train
transmission
vintage
watch
wheel
white
work