The specimen was heated and burnt in oxygen fluid in high-frequencyinductionfurnace. Carbon in specimen was transformed into carbon dioxide, and then determined by infrared absorption method.
试样于高频感应炉的氧气流中加热燃烧。使样品中的碳全部转化为二氧化碳，红外检测。
2
The specimen was heated and burnt in oxygen fluid in high-frequencyinductionfurnace.
试样于高频感应炉的氧气流中加热燃烧。
3
It was investigated that the short-cut process of producing high quality iron castings by duplex melting with blast furnace and medium frequencyinduction furnace.