英文關鍵字
agriculture
business
capacity
city
economy
energy
field
flow
flying
industrial
land
metallic
oil
people
petrochemical
pipeline
pipes
products
refinery
stream
summer
transportation
英文關鍵字
agriculture
business
capacity
city
economy
energy
field
flow
flying
industrial
land
metallic
oil
people
petrochemical
pipeline
pipes
products
refinery
stream
summer
transportation