英文關鍵字
activity
background
build
builder
cement
columns
concrete
construction
contractor
crushed
domestic
economic
equipment
gravel
heavy
industrial
industry
infrastructure
iron
labor
liquid
marl
mason
masonry
mix
mixed
mixer
mixing
mortar
piles
plasterer
plastering
pour
pouring
public
rebar
reinforced
reinforcement
renewal
repair
residential
road
sand
site
steel
stone
wet
work
worker
zone