DIN EN ISO 7971-2-2010 谷类.体积密度,又称每百升质量的测定.第2部分:(ISO 7971-2-2009).德文版本EN ISO 7971-2-2009
Cereals - Determination of bulk density, called mass per hectolitre - Part 2: Method of traceability for measuring instruments through reference to the international standard instrument (ISO 7971-2:2009); German version EN ISO 7971-2:2009