機器
activity
building site
busy
cement
civil engineering
column
concrete
construction
covering
earth mover
earthwork
edifice
equalization
equalizes
equates
flat
flatten
flattener
grader
grading
ground
industrial
industry
joist
landscape
layer
level
leveler
machinery
move
pillar
push
roadwork
sand
scrape
scraper
site
soil
space
spread
spreading
structure
surface
terrain
transform
transformation
work
yellow
zone