因而品种繁多
Hence the wide variety
以上为机器翻译结果，长、整句建议使用 人工翻译 。
爪极是汽车电机上的主要零件，其品种繁多，形状复杂，尺寸精度和内在质量要求比较高，因而制造难度很大。
Generator pole, which has many varieties and complex shape, is the key accessory of automobile generator and has strict limit in its size and quality, so it is difficult to produce.
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