英文關鍵字
above
aerial
air
backhoe
bucket
canyon
construction
digging
dipper
dozer
earthwork
engineering
equipment
excavator
extension
flight
giant
grand
heavy
huge
hydraulic
industrial
industry
job
land
large
load
loader
machine
metal
mine
minerals
mining
mole
mover
old
operation
over
plant
power
quarry
rocks
rocky
rusty
sand
stone
technology
transport
turnable
view
water
work