全钢板焊接结构，综合处理(振动时效、热处理)消除内应力，有很好的刚性与稳定性。

All steel welded structure, vibrating treatment of ageing for removal of internal stress, with good rigidity and stability.

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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。

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.

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