为了保证设计的质量优良,到目前为止,中型及中型以上的水力发电站设计工作,有四个步骤: (1)技术经济调查报告,简称为‘技经报告’;(2)初步设计;(3)技术设计;(4)施工详图; 上述设计工作步骤的最後三项,皆称为设阶段;技经报告的编制是设计阶段以前的设计工作。 In order to ensure the excellent quality of design, the design work for medium and medium-sized or above hydroelectric power stations has so far been carried out in four steps: (1) technical and economic survey report, referred to as ’technical report’ for short; (2) preliminary design; 3) Technical design; (4) Construction details; The last three items of the above design work procedures are called design stages; the compilation of technical reports is the design work before the design stage.