機器
activity
asphalt
beginning
blade
building site
civil engineering
construction
contractor
covering
dirty
dust
earth mover
flat
grader
grading
gravel
grind
ground
hydraulic
industrial
industry
land
large
layer
level
leveler
leveling
machinery
material
mechanical
orange
road
roadwork
sand
scrape
scraper
site
soil
space
spoil
spread
surface
technical
technology
vehicle
view
wheel
wide
work