機器
activity
alloy
cargo
casting
crucible
dross
dump
dust
equipment
factory
ferroalloy
ferrous
foundry
gear
glow
heat
heavy
hot
incandescent
industrial
industry
iron
ladle
machinery
mechanism
mechanization
melt
metal
metallurgy
metalwork
molten
overhead crane
plant
pollution
pouring
production
scoop
slag
smelting
steel
stream
technology
tipper
transportation
transporter
unload
vapor
waste
work