英文關鍵字
agricultural
agriculture
air
auto
automobile
automotive
belt
business
car
component
compressor
cylinder
detail
diesel
dieselengine
drive
engine
engineering
equipment
filter
gear
generator
industrial
industry
iron
machine
machinery
mechanic
mechanical
metal
modern
motor
new
oil
old
piston
power
radiator
repair
steel
technician
technology
tractor
transport
transportation
truck
tube
valve
vehicle
wheel