It is testified by instance that the relative error of stimulated annealing grey model is smaller than traditional grey model's and it has improved the prediction precision.

经过实例检验，改进的模拟退火-灰色模型的相对误差比传统灰色模型小的多，提高了预测精度。

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Maintenance methods: replace the precision of the clutch wheel and the small steel wheel or wear the gear after annealing treatment, repair the wear gear and then annealing the gear quenching.

维修方法：更换精准表离合轮和小钢轮或者把磨损齿轮经过退火处理，修复磨损齿轮再把退火的齿轮进行淬火处理。

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Resisting casting iron and have relieved the internal stress through aging annealing treatment to ensure the high precision and high rigidity to prolong the service life of the machine.

机体结构部分： 本机主要铸件均采用高级耐磨铸铁料，并经由时效退火处理，消除内应力，以确保高精度不变，高刚性，延长了机器使用寿命。

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