Moreover emphasizes the problems in the design of plants in ecological landscape such as the selection of plants phyletic and the determination of quantity.
同时强调了生态园林设计中植物配置容易出现的问题、种类的选择、数量的确定、表现的艺术美感。
The treatment technique of Matigou Mine well water, selection of Coaqulant agent, determination of quantity, selection of equipment and analysis of expense are introduced.
介绍了马蹄沟矿矿井水的处理工艺、混凝剂的选择、投加量的确定、设备选型和费用分析等问题。
Presents the selection and calculation method and quantity determination of the circulating water pumps, and the operation characteristics of the pumps in parallel.
介绍了循环水泵的选择计算方法，循环水泵台数的确定原则，以及水泵并联运行的特点。
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