Resistor are usually divided into three series: fixed resistors, variable resistor and special resistance.

电阻器通常分为三大类：固定电阻，可变电阻，特种电阻。

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According to different raw materials, the company's bio-diesel production equipment is divided into three series.

根据不同的原料，公司的生物柴油生产设备分为三种系列产品。

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At present, our products are divided into three series and over 20 kinds, which are well sold to all over China and overseas like Asia, Africa, South Africa, etc.

当前公司产品有三大系列，二十多个品种，销往全国各地，并出口到亚洲、非洲、南美洲等国家。

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The Intercontinental Cup involves 12 teams, divided into four groups of three, playing a series of three-day matches with the winners progressing to the semi-finals in the United Arab Emirates in November.

BBC: Davison dominates USA