英文關鍵字
basic
burn
burning
business
cast
casting
coal
craft
department
employee
energy
environment
environmental
equipment
factory
fire
flame
foundry
furnace
fusion
heat
heavy
hot
industrial
industry
iron
job
ladle
liquid
machinery
manufacture
manufacturing
melting
metal
metallic
metallurgical
metallurgy
mill
mining
molten
plant
pouring
production
red
shop
smelting
steel
technology
torch
work