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