action

aeration

aerator

air

aquaculture

bubble

circulate

clean

dirty

dissolved

electric

energy

environment

equipment

fill

floating

flow

foam

generator

green

hitting

increase

industrial

industry

lake

machine

motor

nature

outdoor

oxygen

paddle

pollution

propeller

pump

rotating

rotation

speed

splash

surface

system

techniques

technology

treatment

turbine

turbines

waste

wastewater

water

wheel