機器
asphalt
asphalting
background
black
build
builder
cement
city
color
concrete
construction
constructor
contractor
equipment
foundation
highway
hot
house
industrial
industry
job
man
material
metal
mix
mixing
mortar
old
pour
project
public
renewal
repair
road
sand
site
street
teamwork
technology
transportation
trowel
urban
water
wet
worker