The minimum sampling area of a major plant community in Meiziya Region was studied by using methods of species area curves and community coefficient area curves.
用种面积曲线和群落系数面积曲线的方法对宜昌梅子垭地区一种主要植物群落类型的最小面积进行了研究。
The future key to solve this problem in making excellent starting component will be further elevating average temperature coefficient of material resistivity in whole PTC region.
今后研制高性能启动元件所要解决的关键问题是进一步提高材料在整个PT C区域内的平均温度系数。
The seasonal coefficient of grounding resistance possibly reaches 3.0 in freezing region of North China, and those of touch voltage and step voltage 10 and 5.4, respectively.
在我国北方高寒冰冻地区接地系统的接地电阻季节系数可达3.0，接触电压和跨步电压季节系数可能达到10和5.4。
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