英文關鍵字
plant
industry
steel
billets
cutting
torch
hot
mill
industrial
manufacturing
manufacture
heavy
heat
flame
metallurgy
foundry
fire
machine
equipment
iron
red
production
factory
furnace
work
workshop
melting
metal
resource
rolling
orange
molten
sparks
liquid
metallurgical
bright
move
power
smelter
machinery
technology