DIN EN 17151:2017-09 草案 非壓力地下輸送和儲(chǔ)存非飲用水的塑料管道系統(tǒng) 測定箱子長期抗壓強(qiáng)度的試驗(yàn)方法
Draft Document - 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 and English version prEN 17151:2017