機器
blue
chemical
chemistry
color
colorful
dark
energy
engine
engineering
equipment
facility
factory
field
global
heavy
high
industrial
industry
iron
light
line
lpg
machinery
mast
mechanism
metal
nature
night
oil
outdoor
petro
petrochemical
petroleum
plant
power
refinery
resource
silo
silver
sky
station
steel
structure
sunset
supply
technology
tower
transformer
twilight