機器
blue
bridge
build
building
cement
collar
concrete
constructing
construction
creation
crew
economic
economy
elevated
elevation
equipment
first
freeway
ground
heavy
highway
horizontal
job
machinery
male
man
manual
new
operating
operator
overpass
person
preparing
project
projects
public
road
safety
site
steel
stimulus
street
structure
under
vest
work
worker
working
works