DIN EN 17151:2019-11 非飲用水地下非壓力輸送和儲存用塑料管道系統(tǒng)-盒子長期抗壓強度測定的試驗方法
Plastics piping systems for non-pressure underground conveyance and storage of non-potable water - Test method for determination of long-term compression strength of boxes; German version EN 17151:2019