英文關鍵字
barrel
bright
bucket
cast
construction
crane
crude
danger
equipment
factory
fire
flame
floor
furnace
fused
heat
heavy
hook
hot
huge
indoor
industrial
industry
iron
ladle
machine
manufactured
manufacturing
melting
metal
metallic
metallurgical
metallurgist
metallurgy
mill
molten
production
recycling
scrap
shop
smelting
sparks
steel
technics
technology
temperature
work