機器
african
american
builder
command
concept
construction
contractor
dangerous
energy
engineer
engineering
equipment
gas
grove
hand
hardhat
helmet
industrial
industry
inspect
inspector
maintenance
man
manufacturing
mechanic
mechanical
metal
oil
operation
outdoors
professional
project
railway engineer
repair
safety
service
site
station
system
technician
technology
tools
train
train station
transportation
work
worker
workshop
定額
African machine engineer technician wearing a helmet, groves and safety vest is using a wrench to repair the train transport gas and oilの素材 [FY310167318650]
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