金属産業
abundance
built structure
business
business finance and industry
construction industry
crane machinery
cylinder
economy
engineering
factory
finance
finance and economy
gas pipe
gasoline
group of objects
heavy
heavy metal
industrial equipment
industry
iron metal
manufactured object
manufacturing
manufacturing equipment
merchandise
metal
metallic
metallurgy
metalware
metalwork
modern
natural gas
occupation
oil industry
pipe tube
pipeline
place of work
production line
social issues
stack
steel
tube
warehouse
water pipe
working