论文部分内容阅读
到1979年底为止,在有关国际组织的协助下,共有675,000台手压泵提供给孟加拉国的农民,这些泵都用来灌溉和提取饮用水。到1984年底,将又有180,000台手压泵用于灌溉。许多国家(如孟加拉国、斯里兰卡、马来西亚、印度等国)也有大量的这种水泵在使用。从能量消耗的观点来看,这些国家的水泵尚未取得令人满意的发展。因为这些水泵仍旧沿用本世纪初的设计方法,而未进行合理的改进。人们已经认识到
By the end of 1979, with the assistance of relevant international organizations, a total of 675,000 hand-pressure pumps were provided to farmers in Bangladesh for the irrigation and extraction of potable water. By the end of 1984, an additional 180,000 hand pumps will be used for irrigation. A large number of such pumps are in use in many countries (eg Bangladesh, Sri Lanka, Malaysia, India and other countries). From the point of view of energy consumption, the pumps in these countries have not yet achieved satisfactory development. Because these pumps are still using the design method of the early of this century, without reasonable improvements. People have come to realize