Figure 3 illustrates these relationships. The specification groups policies into several categories, including.
图3说明了这些关系。
Materials for railway vehicles; elastomers; functional group: non permanent door and window seals; specification groups.
铁道机车用的材料；弹性体，功能组；非永久性密封的门、窗型材，要求类别。
That being said, I do believe (or maybe it's just a hope) that at some point both groups will combine their efforts and produce a single specification.
这就是说，我确实相信（或者可能仅仅是一个期望）两个组将结合他们的努力并产生一个单独的规范。
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