英文關鍵字
plant
factory
equipment
machine
device
apparatus
cylinder
metal
grinding
sifting
ore
minerals
mining
industry
rotate
production
produce
shaft
roller
metallurgy
英文關鍵字
plant
factory
equipment
machine
device
apparatus
cylinder
metal
grinding
sifting
ore
minerals
mining
industry
rotate
production
produce
shaft
roller
metallurgy