介绍了栾川白钨资源概况，对白钨综合回收和利用的必要性和可行性进行了分析，对其产业化前景进行了展望。
The scheelite resources of Luanchuang is introduced, the necessity of complex utilization of scheelite is analysed and the prospect of complex utilization of scheelite is discussed.
原水、供水、节水、排水、污水处理及水资源回收利用等业务形成了一个相对封闭的水务产业链。
Water industry includes the activities of water resource, supply, saving, drainage, sewage disposal and recycle , which construct a relative close industry chain.
在许多国家，再生资源的回收利用已经成为一个十分重要的产业。
In many countries, recycle of renewable recourses has become a very important business.
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