英文關鍵字
builder
building
cement
cementing
close
concrete
concreting
construction
contractor
design
dirty
equipment
filling
flow
gravel
industrial
industry
infrastructure
job
labor
landscape
liquid
logistic
machine
material
metal
mix
mixer
mixing
outdoor
pour
pours
process
rails
reinforced
reinforcement
safety
sand
site
siten
steel
surface
tool
tracks
transportation
truck
wall
work
worker
works