機器
base
build
builder
cement
clay
composition
concrete
construction
contractor
crane
dangerous work
development
engineering
equipment
flood
foundation
hard
heavy
industrial
industry
infrastructure
labor
large
load
machinery
material
mix
mixer
mixing
mortar
pour
rain
renewal
road
security
site
slippery
steel
steel beam
surface
terrain
tool
transport
transportation
truck
wet
wheels
work
worker