Dimensioning of basic body,cutting and interpenetration bodies 常见基本体、截勿体及相贯体的尺寸注法 2.Dimensioning of subtraction/cutting type solid截切体的尺寸注法 When dimensioning cutting type composite solid,there are also dimensions for defining location of individual shape elements,such as cutting planes,in addition to the above shape dimensions.As the intersection curve is uniquely defined with basic shape dimensions and location dimensions,there is no need to dimension intersection curves.在标注截切体的尺寸时，除应标注上述定形 尺寸外，还应注出确定藏平面位置的定位尺寸。由于截平面在形体上的相对位， 置确定后，截交线即被惟一确定，因此对截交线不应再标注尺寸。 应注截平面定位尺寸 中26 中26 3 SR13 截交线处不注尺寸 中26 面内塔 24 应注截平面定位尺寸 截交线处不注尺寸6 截交线处不注尺寸 应注截平面定位尺寸 应注截平面定位尺寸   