DIN EN ISO 2692-2007
产品几何技术规范(GPS).几何公差.最大实体要求(MMR)、最小实体要求(LMR)和可逆要求(RPR)
Geometrical product specifications (GPS) - Geometrical tolerancing - Maximum material requirement (MMR), least material requirement (LMR) and reciprocity requirement (RPR) (ISO 2692:2006); English version of DIN EN ISO 2692:2007-04