DIN EN ISO 1183-1:2019 塑料非泡沫塑料密度测定方法第1部分:浸渍法、液体比重瓶法和滴定法(ISO 1183-1:2019,修订版2019-05)
Plastics - Methods for determining the density of non-cellular plastics - Part 1: Immersion method, liquid pycnometer method and titration method (ISO 1183-1:2019, Corrected version 2019-05)