英文關鍵字
activity
adult
architect
armature
beam
buildings
concrete
construction
contractor
craftsperson
crane
day
development
engineering
equipment
fittings
frame
hardhat
heavy
helmet
home
housing
industry
luzhniki
machinery
males
manual
occupation
operator
panorama
people
plan
project
ray
round
scaffolding
site
stadium
steel
strength
structure
sun
teamwork
truck
worker