機器
action
america
attempt
bar
bending
build
building
business
construction
effort
energy
engineering
equipment
horizontal
industrial
industry
iron
job
machinery
material
mechanical
men at work
metal
metallic
person
photo
photograph
plant
prepare
process
production
pull
rebar
rod
safety
shapes
shop
site
specialist
steel
strength
tool
uniform
us
work
worker
working
workplace
workshop