密闭鼓风炉铅锌熔炼法的英文

imperial smelting process

• 密闭:    be airtight; be he ...
• 鼓风炉:    blast furnace
• 铅:    a surname
• 锌:    zinc
• 熔炼:    smelt; smelting; f ...
• 法:    law