We can use theory of optimal design and solving view, and with help of the technique index, that is boundary condition of comprehensive tolerance zone, Removing a binding condition, It be comes uniaxial design variable and obtains reasonable formula.

• 在求解时，借助于技术指标即综合公差带的边界条件，解除了一个约束条件变为一维设计变量，最后求出合理的公式。