英文關鍵字
oscillating
oscillate
oscillation
toy
wood
install
springs
obstacles
steel
rough
mate
entertainment
equipment
shock
activity
running
parkour
public
area
attraction
recreation
jump
absorber
fun
kindergarten
preschool
amusement
inertia
park
kids
acrobatic
tricks
agility
yellow
wooden
log
vibrating
vibration
children
playing
garden
trampolining
panelling
car
spring
playground
leisure
outdoor
lawn