機器
aligned
alignment
application
automobile
axial
background
bearing
car
circle
circular
component
daily
drawing
everyday
external
facilitate
flywheel
force
friction
graphic
gravity
illustration
image
isolated
moment
motion
motor
movement
potter
reduces
roll
rolling
rotate
rotating
rotation
round
rounded
rubber
rubberized
ship
steering
torque
transport
transportation
vehicle
wheel
white