汽车、拖拉机类的编制原则在图书分类法中有着独特的意义。汽车、拖拉机都是地面车辆,是一种机械类型;它们与内燃机、农业动力以及其它学科有着密切的联系。因此,汽车、拖拉机类有着与其它工程技术类尤其机械工程类的共同点,拿它来剖析,足可谋一斑以观全豹。对于这一有意义的问题,由于在立类依据,定类标准以及处理技术上的不同,因此有着判然不同的体系。如果没有把握到问题的要点,就难于获得比较完满的结论。我们认为,要 The compilation principle of cars and tractors has a unique meaning in the book taxonomy. Vehicles, tractors are ground vehicles, a type of machinery; they are closely linked with internal combustion engines, agricultural power and other disciplines. Therefore, cars, tractors and other engineering and mechanical engineering in particular have the same class, take it to analyze, enough to find a way to see the whole leopard. There is a very different system for this meaningful issue, due to the differences in the basis of classification, classification criteria and processing technology. If you do not grasp the point of the problem, it is difficult to obtain a more complete conclusion. We think, want