英语翻译

英语翻译
Lubrication for the timing chain is supplied at two points；by a feed from the front camshaft bearing into the periphery of the camshaft chain wheel and also by oil fed through the hollow shaft on which the timing chain jockey pulley is mounted arid thence through holes in the circumference of the jockey pulley.
我查了词但最后还是翻译不出来`~T_T
在线的句子试图翻译过了`~出来的全是火星文……
求汽车专业英语帝
词方面给你们点提示：Lubrication 润滑油 timing chain正时链条 camshaft 凸轮轴 hollow shaft 空心轴 jockey pulley 张紧轮 circumference周围