機器
action
aeration
aerator
agriculture
air
axis
axle
core
drive
electric
energy
engine
environment
equipment
farm
fill
fish
float
flow
fresh
green
increase
industry
lake
metal
motion
motor
nature
outdoor
oxygen
pole
pollution
pond
power
pump
recycle
roll
round
rural
spin
swamp
swivel
tool
treatment
turbine
vane
waste
water
wave
wheel
whirl
work