英文關鍵字
beam
beams
building
climb
climber
climbing
construction
contractor
development
engineering
equipment
extreme
factory
frame
framework
girder
hard
high
improvement
job
labor
male
man
metal
metalwork
occupation
outdoor
professional
project
protection
risky
site
skill
skilled
steel
structural
structure
truss
unsafe
welder
welding
work
worker
working
workplace