英文關鍵字
activity
build
builder
cement
cementing
concrete
concreting
construction
contracting
contractor
employment
equipment
gravel
industry
infrastructure
jobs
labor
liquid
mixer
mixing
pavement
paving
people
pour
pouring
process
project
public
reinforced
reinforcement
roadworks
shovel
sidewalk
site
slab
street
structure
truck
using
wet
worker
works