英文關鍵字
activity
asphalting
bailer
bucket
building
business
clay
closeup
construction
dig
digger
dipper
dirt
dirtiness
earth
equipment
excavate
excavation
excavator
filth
grab
ground
heavy
hydraulic
ladle
leveled
machine
machinery
mover
outrigger
power
preparation
road
scoop
shovel
site
work