英文關鍵字
asphalt
building
business
cement
city
commercial
concrete
construction
constructor
designer
development
dwelling
engineering
helmet
industry
job
labor
labour
labourer
man
manual
occupation
outdoors
pad
people
plan
profession
property
railroad
railway
red
repair
road
roadsign
security
shovel
site
steel
street
team
teamwork
tools
urban
work
worker
workforce