機器
broadcast
cell
communications
connection
construction
crane
danger
drill
electricity
energy
environment
equipment
exploration
fuel
gas
gasoline
generation
global
grid
heavy
industrial
industry
microwave
natural
ocean
oil
oilfield
petroleum
pipe
pipeline
plant
platform
pole
pollution
power
production
pump
radio
relay
resource
rig
sea
sky
steel
structure
telecommunications
telephone
transponder
wave