英文關鍵字
activity
architecture
buildings
cement
civil
concrete
concreting
construction
contractor
engineer
engineering
floor
floors
foundation
gravel
industrial
industry
infrastructure
job
labor
machine
machinery
material
metal
mixed
mixer
occupation
people
pour
professional
project
ready
rebar
reinforced
reinforcement
repair
road
safety
sidewalk
sit
site
steel
structure
surface
tool
work
worker