我厂遵照毛主席关于“人类总得不断地总结经验,有所发现,有所发明,有所创造,有所前进”的伟大教导,在制作蒸汽机车阀调整新方法方面,五年来不断地进行研究改进工作。一九七一年内先后提出了两种简易两用阀调计算尺的方案。简易两用阀调计算尺可用于 Our factory follows the great teaching of Chairman Mao on “mankind always has to sum up experience, found, invented, created, and progressed”. In the past five years, we have been conducting research on new methods of making steam locomotive valves Improve work In 1971, two schemes of simplified simple dual-purpose valve caliper were put forward. Simple dual-use valve caliper can be used