機器
airport
architecture
asphalt
business
car
construction
control
crowd
electricity
energy
engineer
engineering
equipment
factory
generator
heavy
industrial
industry
infrastructure
inspection
interior
job
light
line
machinery
maintenance
manufacturing
metal
modern
network
nobody
paving
people
plant
power
pressure
repair
safety
shop
steam
street
tourist
transport
transportation
travel
truck
warehouse
work
worker