英文關鍵字
casting
equipment
factory
heavy
hot
industrial
industry
iron
line
machine
making
manufacturing
metal
metallurgical
metallurgy
pipe
pipeline
plant
process
product
production
steel
technology
tube
working
英文關鍵字
casting
equipment
factory
heavy
hot
industrial
industry
iron
line
machine
making
manufacturing
metal
metallurgical
metallurgy
pipe
pipeline
plant
process
product
production
steel
technology
tube
working