英文關鍵字
block
blue
check
chemical
connection
connector
contemporary
date
distribution
energy
engineering
equipment
factory
flange
fuel
gas
industry
joint
junction
kazan
manometer
manufacture
metal
meter
oil
pipe
pipeline
plant
power
pressure
pump
red
refinery
round
screen
system
tatarstan
technology
transit
transportation
tube
valve
yard