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序言钢铁生产早期年代,与现在相比,情况是颇为简单的。小工厂拔地而起,为一个有限的地区服务,社会不是那么流动性的。马拉车产生的应力与大型喷气机脚架相比,小得很多。宇航时代的技术对质量管理提出了高的要求。高级技术的需求不仅限于计算机
Preface In the early years of steel production, the situation was rather simple compared to the present. Small factories stand up to serve a limited area, the community is not so fluid. The stress generated by horse-drawn carts is much smaller than that of a large jet tripod. Astronautic technology put forward high requirements for quality management. The need for advanced technology is not limited to computers