英文關鍵字
chaipattana
aerator
invention
king
bhumibol
great
rama
used
improving
water
quality
thailand
park
low
speed
surface
pollution
developing
wastewater
treatment
improvement
environment
oxygen
moving
rotating
floating
buoy
machine
surf
boat
engine
propeller
working
low-cost
mechanical
device
famous
popular
amazing
incredible
river
lake
pond
reflection
garden
tree
grass
lawn
plant
nature
summer
sunlight
outdoor
daytime
footage