英文關鍵字
concrete
liquid
form
poured
mixer
high-quality
construction
site
background
buildings
technology
cement
truck
cementing
concreting
heavy
job
labor
pour
process
shovel
structure
transport
transportation
water
wet
foundation
activity
architecture
build
business
contractor
delivery
dirty
equipment
flow
gravel
house
industrial
industry
infrastructure
logistic
machine
machinery
material
metal
mix
mixing
rebar
reinforcement
steel
tool
work