BS EN ISO 2692:2006 产品几何量技术规范(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)
This International Standard defines the maximum material requirement, the least material requirement and the reciprocity requirement, and specifies their applications. These requirements are used to control specific functions of workpieces where size and geometry are interdependent, e.g. to fulfil the functions “assembly of parts” (for maximum material requirement) and “minimum wall thickness” (for least material requirement). However, the maximum material requirement and least material requirement are also used to fulfil other functional design requirements.