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1·The company has also purchased various vehicle necessary special-purpose removal and installation tools.

公司还购置了与各车型配套的专用拆装工具。

2·All these methods are suitable for the design of gearboxes not only in general machinery, but also in various machinery and special purpose machine tools used in railroad factories.

这些方法不仅适用于一般机械，也适合于铁路工厂各种机械、专机中的齿轮变速箱设计。