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.
本文主要研究了大高径比ZA27合金铸件挤压铸造过程的若干基本问题。
The fundamental problems of ZA27 alloy squeeze casting with high ratio of height to thickness were studied in this paper.
我们主要生产汽缸体和汽缸盖铸件。
We mainly produce the cylinder block and cylinder head castings.
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