機器
abstract
accuracy
aluminum
attached
axle
bearing
business
car
clockworks
cogs
coupling
crank
engine
engineering
equipment
gear
gearbox
gearing
gearwheels
heavy
industry
innovation
inside
interlocked
invention
iron
large
mainshaft
mechanical
metal
metallic
motor
parts
pinion
power
shaft
shiny
spinning
sprocket
stainless
steel
strength
technology
torque
work