機器
alloy
auto
automobile
bolt
car
chrome
combustion
component
crank
crankshaft
cylinder
diesel
drive
energy
engine
engineering
equipment
front
fuel
gear
generate
heavy
industrial
industry
internalcombustion
iron
isolated
mechanic
mechanical
mechanics
mechanism
metal
metallic
motor
part
piston
power
precision
propulsion
repair
shiny
spare
steel
technology
transportation
truck
valve
vehicle
white