bailing ring是什么意思

用法例句

Exploration of the Discussion on the Ways of Building Water-collecting Green Space in Beijing;

北京集水型公园绿地建设探讨

On the basis of natural conditions of lack of rainfall on the Loess Plateau, this paper presents a method of design and construction in rainwater harvesting system for afforestation, which is suitable to the regions of 300 600?mm rainfall.

根据黄土高原地区降水缺乏的自然条件 ,该文提出了 30 0mm到 6 0 0mm地区用于造林的集水设计与施工方法 。