They have a variety of technical articles, mostly related to irrigation and water treatment, available for free download in the "Library" section of their site.
网站的“图书馆”有各种专业文章，大部份与灌溉和水处理相关，免费下载。
The arched section is one of the usually adoptive section shapes in flood discharge tunnels and irrigation tunnels, but the analytic expression of normal water depth for this section is not explicit.
普通城门洞形过水断面是泄洪隧洞和灌溉引水隧洞较常采用的断面形式之一，其水力计算中的正常水深求解无显函数形式的表达公式。
According to environment status of sand chamber section in Yellow River irrigation area, to table a proposal of environment treatment.
根据引黄灌区沉沙池区农业环境及农村环境现状，提出了治理该区域环境的具体措施。
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