機器
actuator
auto
automobile
automotive
background
belt
car
chain
chrome
clean
cog
complex
contemporary
cylinder
device
diesel
drive
electric
engine
engineering
equipment
fuel
gear
generator
heart
industrial
machinery
manufacturing
mechanic
mechanical
metal
metallic
modern
motor
motorized
new
part
performance
piston
power
pulleys
shiny
speed
steel
technology
transmission
transportation
valve
vehicle