機器
accuracy
auto
background
ball
bearing
bright
chrome
chromed
circle
closeup
construction
driving
engine
engineering
equipment
industrial
industry
isolated
life
machinery
material
mechanics
mechanism
metal
metallic
motion
motor
object
part
parts
precision
replacement
ring
roller
rolling
round
service
silver
spare
sphere
steel
still
technical
technology
train
transportation
turning
wheel
white