DIN 1185-1-1973 排水.管道排水、明渠排水和底层土壤改良的地下水控制.一般说明和特殊情况
Drainage; Control of Sub-surface Water Management by Draining with Pipes, Open-ditch Drainage and Amelioration of the Subsoil; General Instructions and Special Cases
Drainage; regulation of soil water management by drainage with pipes, drainage without pipes and subsoil amelioration; general instructions and Special cases