英文關鍵字
belt
black
boiler
cart
cettle
cogwheels
connecting
cylinder
detail
drive
engine
flywheel
gearbox
gears
grease
horsepower
motor
moving
old
output
painted
performance
power
red
rod
rotating
spikes
spin
steam
transmission
valve
watt
working
英文關鍵字
belt
black
boiler
cart
cettle
cogwheels
connecting
cylinder
detail
drive
engine
flywheel
gearbox
gears
grease
horsepower
motor
moving
old
output
painted
performance
power
red
rod
rotating
spikes
spin
steam
transmission
valve
watt
working