This paper introduced the production method, application field and the current production status in domestic market and analyzed the market prospect in the related fields.
介绍了金属锂的生产方法、应用领域及中国国内生产现状，分析了金属锂在相关领域内的市场前景。
The structures and characters of present micro-sprinklers are summarized, current research and production status at hone and aboard are sum up.
总结了现有微喷头的几种结构形式及其结构特点，归纳了国内外微喷头的研究和生产现状。
The current status of research work, production technique and application on high chromium white cast iron are introduced and its research trend is also discussed.
介绍了高铬白口铸铁的研究、生产工艺和应用情况；并对高铬白口铸铁的研究方向提出了看法。
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