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最大实体原则是当被测要素和基准要素偏离最大实体尺寸时，形位公差可以获得补偿值的一种公差原则。最大实体原则主要用于要求具有可装配性的零件上，如箱盖。法兰盘等以孔连接的零件。对这些零件的配合性质无严格要求，但要求结合件之间具有足够间隙量，足以补偿形位误差，保?
The principle of maximum solidity is a tolerance principle that the form tolerance can obtain the compensation value when the measured element and the reference element deviate from the maximum physical dimension. The principle of maximum solidity is mainly used for parts that require assemblability, such as the lid. Flanges and other parts connected to the hole. There is no strict requirements on the fitting nature of these parts, but the requirement is that there should be enough clearance between the parts to compensate for the shape and position error.