This paper discusses the basic theory, applied region and technical main point of the hillside cultivated alleg directed regional field.
阐述了坡耕地垄向区田的基本原理、应用范围及技术要点。
From the using point of view, the main technical performance to appraise the heat transfer performance of automobile radiator includes heat transfer performance, air resistance and water resistance.
从应用角度看，评价散热器散热性能的主要技术指标有散热性能、散热器空气阻力以及水流阻力，分别简称为散热量、风阻及水阻。
The main technical point of culture loach in net cage and disease control are introduced.
介绍了网箱养鳅的技术要点以及泥鳅常见疾病的防治方法。
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