驱动链轮 meaning in English

drive sprocket

Boom - type roadheader - series and parameters of scraper round link chain and driving sprocket
悬臂式掘进机.圆环刮板链及驱动链轮的系列与参数
The minimum centre distance is sometimes governed by the amount of chain lap on the driver sprocket , our normal recommendation in this circumstance being not less than six teeth in engagement with the chain
最小中心距有时由驱动链轮轮齿与链条接触数量决定，在这种情况下我们通常建议有不少于6个的轮齿与链条啮合。