It has been proved that Low Till Farming increases harvests and reduces water use, and this method reduced the need for chemical products because there are fewer unwanted plants.
实践证明，低耕农业提高了作物产量，减少了用水量；而且，由于有害植物变少了，这种农业对化工产品的需求也降低了。
The use and production method of some urea downstream products which have broad market prospects are introduced.
介绍了几种具有广阔市场前景的尿素下游产品的用途、生产方法及国内外生产情况。
The method is that takes physical parameter of bearing as design variable. It has good practicality in actual use. It is effective in practice proved by the use of products of fan.
该方法以轴承物理参数为设计变量，在工程实际应用中具有很好的实用性，通过在风机产品上的应用，证明该方法是行之有效的。
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