DIN 11622-22-2015 青贮饲料和液体肥料容器, 沼气厂中的容器, 燃料筒仓和沟槽筒仓. 第22部分: 作为青贮饲料和液体肥料容器, 燃料筒仓和沟槽筒仓以及液体肥料渠道的失模的混凝土砌块
Silage and liquid manure containers, containers in biogas plants, bunker silos and trench silos - Part 22: Concrete blocks acting as lost formwork for silage and liquid manure containers, bunker silos and trench silos and liquid manure channels