英文關鍵字
abstract
aluminum
bright
casting
department
dirty
engineering
factory
flame
foundry
furnace
hardhat
heat
heavy
helmet
hot
industrial
industry
iron
job
liquid
male
manufacture
manufacturing
melting
metal
metallurgist
metallurgy
mine
molten
orange
person
plant
pour
pouring
production
profession
red
skill
smelt
smelting
soot
space
sparkles
steel
technology
unit
work
worker