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- Introduced one kind of new technology of nitrogen purifies applies into the melt sourcing because of the high purchase cost of pure nitrogen, and will take inconvenience to the enterprises. 摘要外购高纯氮气，不仅价格高，而且有时还给生产造成不便，为此研究了一种氮气净化的新技术用于熔体精练。
- Air consists chiefly of nitrogen. 空气主要由氮气组成。
- Nitrogen forms most of the Earth's air. 地球上空气的大部分成分是氮气。
- nitrogen purifier 氮气提纯器
- The lamp is full of gaseous nitrogen. 灯里充满了气体氮。
- Nitrogen forms about 78% of the earth's atmosphere. 氮约占地球大气的百分之七十八。
- What to Look for in a Water Purifier? 如何选购合适的净水器?
- B: I always take a portable water purifier. 我都会带着可携式净水器。
- Burdock is a powerful blood purifier. 牛蒡为强力的净血剂。
- Hospital Grade Air Purifier, now you have! 医疗级空气净化器,您也可以拥有!
- Air Purifier and Humidifier Two in One. 净化空气，除味，灭菌，加湿，彻底解决空气问题
- I always take a portable water purifier. 你去健行的时候会喝那里的水吗？
- Will you sunder nitrogen from air? 你能从空气中把氮气分离出来吗?
- Nitrogen is the most commonly used gas. 氮气是最常用的气体。
- Sample gas tubes are flushed with nitrogen. 采气管得用氮气吹扫。
- The main reservoir of nitrogen is the atmosphere. 氮的主要蓄存库是大气层。
- What is the percentage of nitrogen in air? 空气中所含的氮的比例是多少?
- Fast neutrons are also captured by nitrogen. 快中子也可以被氮吸收。
- Nitrogen forms four-fifths of the atmosphere. 氮气占空气的五分之四。
- Fuel oil purifier overhauled and cleaned, gear case oil renewed. 燃油分油机解体清洁，齿轮箱换油。
