機器
agricultural
agriculture
automobile
automotive
background
belt
business
car
component
construction
cylinder
detail
diesel
engine
engineering
equipment
fuel
gear
harvester
heavy
industrial
industry
injector
loader
machinery
mechanic
mechanical
mechanism
metal
modern
motor
new
oil
power
repair
service
steel
technician
technology
tractor
transmission
transport
transportation
truck
tube
valve
vehicle
work