機器
aggregate
balance
bunded
carving
chemical
chimney
connecting
construction
drive
electric
electrocable
engineering
environment
equipment
factory
flange
fuel
gas
gate
hairpins
industry
manometer
motor
nuts
oil
painted
petrochemical
pipe
pipeline
pipes
plunger
pollution
power
pressure
production
pump
pumpjack
reducer
refinery
regulator
rock
rocking
rod
rosneft
steam
throttle
tightness
weight
well