全国第三次管道输水灌溉技术研讨会纪要全国第三次低压管道输水灌溉技术研讨会于１９９３年１０月２８日至１１月１日在河南省郑州市召开。来自山东、河南、河北、北京、天津等１９个省、市、自治区以及水科院水利所、农田灌溉所、西北水科所、水利电力信息所、水利电力出... Third National Conference on Pipeline Irrigation Technology Symposium The third national seminar on irrigation technology for low-pressure pipelines was held in Zhengzhou, Henan Province from October 28 to November 1, 1993. From Shandong, Henan, Hebei, Beijing, Tianjin and other 19 provinces, municipalities and autonomous regions as well as the Water Resources Institute of Water Conservancy, farmland irrigation, Northwest Institute of Water Resources, water and electricity information, water and electricity out ...