機器
activity
blue
box
boxing
build
builder
building
buildings
cast
castinplace
castinsitu
cement
clouds
concrete
construction
constructor
cranes
development
dump
engineering
equipment
erect
falsework
filling
flow
form
heavy
helmet
house
industry
job
men
new
occupation
orange
outdoors
people
pipe
rig
site
sky
steel
structure
sunset
urban
winter
work
worker
working