special methods and tools
special methods and tools
特殊的方法和工具
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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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。
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