金属産業
機器
alloy
asia
automation
boiler
boilers
burntout
cast iron
casting factory
china
color images
concept
danger
east asia
factory
flame
heat
heavy industry
indoor
industrial
industrial buildings
industrial machinery
light
liquid
low angle
luminous
machinery and equipment
manmade structures
manufacturing
melting
melting furnace
metal
pour
power equipment
production line
shining
skills
smelting
sparks
splash
steel
steel mills
steelmaking
technology
unmanned
workshop