機器
environmental
back
barrel
bird
business
button
commercial
construction
crane
currency
derrick
drill
drilling
ecology
energy
engine
environment
equipment
exploration
fuel
gas
gasoline
generation
graphic
gray
grayscale
grey
helicopter
icon
illustration
industrial
industry
large
light
mark
natural
occupation
ocean
oil
petrol
pictogram
pipe
pipeline
plant
platform
pollution
popart
power
pump
resource
rig
sign
silhouette
supply
symbol
technology
tower
water
white
working