BS ISO 1122-2:1999包含国际齿轮词汇表的一部分，该词汇表仅用于蜗轮的几何定义。对于与齿轮有关的每一个几何术语，它都给出了一个国际上有效的标准定义，在每种语言中尽可能选择相应的术语，以便直接反映定义的含义。注:由于必须遵守某些既定惯例，因此在任何特定语言中只能部分实现对相应术语的选择，因此，就翻译成其他语言而言，建议始终参考定义本身的含义，而不是简单地转换原始术语。购买本文件时可获得的所有当前修订均包含在购买本文件中。

BS ISO 1122-2:1999 contains the part of the international vocabulary of gears which is devoted solely to geometrical definitions of worm gears.It gives, for each of the geometrical terms relative to gears, a standard definition which will be valid internationally, the corresponding term being chosen as far as possible in each language in such a way as to be direct reflection of the meaning of the definition.NOTE Since the choice of the corresponding term can only be partially fulfilled in any particular language, due to the necessity of respecting certain established conventions, it is advisable, as far as translation into other languages is concerned, to refer always to the meaning of the definition itself, rather than to a simple transposition of the original term.All current amendments available at time of purchase are included with the purchase of this document.