英文關鍵字
activity
building
car
career
coal
construction
development
dig
dirt
dump
dumper
earth
ecology
environment
equipment
excavation
excavator
extraction
geology
gravel
ground
heavy
industrial
industry
iron
land
large
load
loading
lorry
machine
machinery
metal
mine
mineral
mining
open
opencast
quarry
sand
site
soil
technology
tipper
transportation
truck
unloading
vehicle
work