機器
ball
bearing
belt
cam
cambelt
car
change
circle
component
construction
conveyor
curve
drive
endurance
engine
gear
group
helix
industry
isolated
land
machinery
motivation
new
objects
part
physical
pressure
pull
pulley
roller
rubber
screw
service
spare
spiral
steel
technology
timing
tool
toothed
transportation
vehicle
work
working