機器
arm
auto
cam
cam shaft
car
change
clearance
closeup
concepts
concepts topics
cylinder head
engine
engineering
equipment
examining
gasoline
industry
inside
internal combustion engine
land vehicle
limb body part
machinery
mechanic
metal
metallic
mode of transport
motor
occupation
oil pipe
old
order
part
part of
repair
rocker
rocker arm
screw
service
shaft
spare part
steel
systems
technology
timer
transportation
valve
vehicle
working
workshop