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 7971-2:2019)
谷物.称为每百吨质量的堆积密度的测定.第2部分:通过参考国际标准仪器测量仪器的可追溯性方法(ISO 7971-2-2019)