機器
blue
cloudy
connector
connectors
construction
crude
derrick
diesel
drill
drilling
ecology
energy
equipment
exploration
fuel
gas
gasoline
industrial
industry
jack
motor
nodding
oil
oil industry
oilfield
petroleum
pipe
pipeline
plant
platform
power
pump
pump jack
pumpjack
refine
resources
rig
rocking
silhouette
sky
sun
sunset