機器
auto
background
ball
bearing
car
chassis
chrome
circle
closeup
conveyor
detail
engine
engineering
gear
heavy
hub
industrial
industry
iron
material
mechanic
mechanical
mechanism
metal
metallic
motor
node
object
part
plan
professional
ring
roller
rolling
saw
service
shape
spare
sphere
steel
surveillance
technical
technology
track
tracktor
transport
transportation
vehicle
wheel