英文關鍵字
engineer
building
construction
inspector
phone
safety
business
contractor
crane
site
industry
helmet
civil
engineering
foreman
architect
builder
multistory
skyscraper
industrial
architecture
work
project
supervisor
professional
talking
communication
equipment
job
man
constructor
house
occupation
manager
sunshine
technology
concrete
development
urban
handheld
9x16
vertical