機器
assortment
auto
automobile
automotive
background
box
car
cog
concept
dirty
drive
driven
engine
engineering
gear
industrial
industry
iron
isolated
kit
line
lot
many
mechanic
mechanical
metal
old
out
part
replacement
rod
service
set
shaft
spare
spares
speed
steel
teamwork
technical
technology
tie
toothed
transmission
used
vehicle
wheel
white
worn