architect
background
barrier
builder
building
business
businessman
city
concept
construction
double
electrical
energy
engineer
engineering
exposure
factory
future
gas
hat
helmet
holding
industrial
industry
job
man
people
person
petrochemical
plan
professional
project
safety
security
site
success
technology
white
work
worker
yellow
定額
Double exposure of Engineer holding a yellow helmet for safety of the workers. A modern high-rise structures in the background with strom.の素材 [FY31071400404]
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