機器
activity
aggregate
background
backhoe
bricklayer
building
built
bulldozer
cement
concrete
construction
construction site
contractor
crushed stone
development
digging
dirt
dump
dumper
dumper truck
dumptruck
dust
earthmoving
equipment
excavator
foundation
geology
grain
granite
gravel
gray
ground
heap
heavyduty
house
hydraulic
industrial
industry
job
load
loader
machinery
material
mineral
mound
pebble
pile
power mover
quarry
road
rock
rough
sand
shovel
site
soil
stack
stone
stones
structure
truck
unloading
vehicle
wheel loader
work
worker
working