英文關鍵字
blast
bright
burn
cast
copper
danger
equipment
factory
fire
flame
flowing
foundry
furnace
heat
heavy
hot
industrial
industry
iron
light
liquid
manufacture
manufacturing
melting
metal
metallic
metallurgical
metallurgy
mill
modern
molten
plant
power
production
protection
red
slag
smelting
spark
steel
technology
temperature