我们还根据不同厂家不同品牌的笔所添加的油墨染料的配比的不同，对红色圆珠笔进一步分类。
Every red ballpoint pen was distinguished with others on account of difference in quantity of ink components.
我们还根据不同厂家不同品牌的笔所添加的油墨染料的配比的不同，对红色圆珠笔进一步分类。
Every red ballpoint pen was distinguished with others on account of difference in quantity of ink components.
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