知識(shí)貝殼
知識(shí)貝殼
所屬欄目：水利發(fā)展報(bào)告
IndexValue1. Effective irrigation areaAnnual increase63.47 million hm21.55 million hm22. Water-saving irrigation area27.11 million hm23. Waterlogging proof area21.94 million hm24. Soil erosion and water loss treated areaAnnual increase1.07 million km250,0 ......（本文共 2843 字 , 1 張圖） [閱讀本文] >>