英文關鍵字
abstract
background
black
blob
business
construction
dark
design
diesel
digging
drilling
energy
environment
equipment
extraction
field
fluid
fossil
fuel
gas
gasoline
generation
grunge
industry
liquid
machine
mechanical
money
nature
oil
petroleum
pipe
pipeline
pollution
power
pump
rig
shiny
silhouette
sun
sunset
technology
texture
water
well
wet