地下排放 meaning in Chinese

subsurface disposal

Planning , design and installation of drainage systems protecting structures against water in the ground
地下排放系统防水保护结构的计划设计和设施
Plastics piping systems for non - pressure underground drainage and sewerage - polypropylene - guidance for the assessment of conformity
非承压地下排放和污水用塑料管道系统.聚丙烯? pp .符合性评定指南
Pvc - u . plastics piping systems for non - pressure underground drainage and sewerage - unplasticized poly vinylchloride - guidance for installation
非承压地下排放和污水用塑料管道系统.未增塑的聚氯乙烯
Pvc - u . plastics piping systems for non - pressure underground drainage and sewerage - unplasticized poly vinylchloride - guidance for assessment of conformity
非承压地下排放和污水用塑料管道系统.未增塑的聚氯乙烯