機器
3d
advertise
advertisement
advertising
announcement
banner
billboard
board
brown
chemical
chemistry
construction
energy
engineering
equipment
fuel
fumes
gas
industrial
industry
iron
lines
market
massive
metal
naphtha
oil
oilfield
pipe line
pipelines
pipes
piping
power
production
promo
promotion
prosperity
reservoir
resources
sign
signpost
sky
steel
supply
technical
technological
technology
tubes
work