As compiled from documented foundation for cross - connection control and hydraulic research at the university of southern california lab tests 由位于美国南加州大学内的美国交叉连接管理与水研究基金会的文件编制。
Approved by the foundation for cross - connection control and hydraulic research at the university of southern california , manual section 10 通过位于美国南加州大学内的美国交叉连接管理和水研究基金会和手册第10节的认证。
So developing new facilities and instruments , which correspond present economy conditions , have lower price and can be extended , becomes basic springboard of water - measuring in irrigation district 因此，研制符合我国灌区目前经济发展水平、价格低廉、具有推广价值的量水设施和仪器，成为当前灌区量水研究的基本出发点。
Proven to be efficient and effective of providing quality water , awts is the only water treatment system in hong kong certified by the us national sanitation foundation ( nsf ) , the best guarantee for the cleanest and purest water 安利净水器，经不断改良及革新设计，是全港唯一净水器通过世界权威食水研究机构?美国国家卫生基金会( nsf ) ? 42 、 53 、 55三项认证，是优质净水的最佳保证。
The paper analyzes and summarizes the current research advance in eco - environment water requirement , including the connotation and extent of the eco - environment water requirement , the evaluation methods of eco - environment water requirement , pointing out some problems , and looking forward to the development trend of the eco - environment water requirement 回顾了国内外生态环境需水研究的总体情况，对生态环境需水的概念及其内涵、生态环境需水量化方法等方面的最新研究进行了全面的分析和总结，提出目前生态环境需水研究中亟待解决的一些问题和展望了生态环境需水研究的发展趋势。
Abroad research concentrates primarily in the aspect of river ecosystem . while domestic research mostly concentrates in drought , half drought or drought with seasonal change areas where the supply of water resource is hardly meets the demands and the environment is comparative weak . the research of ecological water requirement in south china is few 国外研究主要集中在河流生态流量方面；国内研究目标多集中在水资源供需矛盾突出以及生态环境相对脆弱和问题严重的干旱、半干旱和季节性干旱的半湿润区，而对南方地区的生态需水研究则更加欠缺。
