機器
3d
architecture
bright
building
business
city
cog
cogwheel
concrete
construction
design
development
energy
engineer
engineering
equipment
estate
factory
flare
gas
gear
gearwheel
glow
golden
industrial
industry
lens flare
light
manufacturing
mechanism
metal
oil
plant
power
production
project
refinery
screw
steel
structure
technical
technology
urban
wheel