architecture
asian
background
blueprint
building
business
chemical
construction
control
design
development
document
drawing
energy
engineer
engineering
environment
equipment
factory
gas
hardhat
helmet
holding
industrial
industry
inspection
inspector
maintenance
male
manager
manufacturing
men
outdoor
paper
people
person
petrochemical
petroleum
pipeline
plant
power
professional
safety
site
standing
technician
technology
work
worker
young
定額
Engineer holding paper factory plant backgroundの素材 [FY310129207052]
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