金属産業
built structure
business
business finance and industry
construction industry
crane machinery
cylinder
economy
engineering
factory
finance
finance and economy
gantry crane
gas pipe
gasoline
hanging
heavy
heavy metal
hoisting
industrial equipment
industry
iron metal
loading
manufactured object
manufacturing
manufacturing equipment
merchandise
metal
metallic
metallurgy
metalware
metalwork
natural gas
occupation
oil industry
overhead crane
pick up
pipe tube
pipeline
place of work
production line
social issues
steel
transportation
tube
warehouse
water pipe
working