機器
alloy
aluminum
assembly
auto
automobile
block
car
closeup
combustion
conveyor
cycle
cylinder
detail
diagnostic
engine
factory
fix
flange
fuel
gear
industry
installation
internal
iron
manual
manufacture
mechanical
metal
model
modern
motor
new
part
piston
plant
ring
round
screw
service
shop
steel
technical
technician
technology
transportation
vehicle
workshop