機器
arm
assembly
background
backhoe
borer
bucket
building
bulldozer
calculation
claw
complete
concentrate
corporate
demolition
design
designer
digger
dozer
draft
draftsmanship
drawing
dredger
drill
drive
drive digger
dump
earth
earthmover
education
engineer
engineering
equipment
excavate
glass
ground
hat
heavy
housebuilding
hydraulic
loader
male
man
mover
new
orange
push
scheme
scraper
shovel
skull
study
track
tractor
training
transmission
truck
type
vehicle
white
work
workplace
yellow