一种用于内燃机的驱动系统，包括将曲轴上的主动链轮连接到凸轮轴上的从动链轮的一条环链。

A drive system for an internal combustion engine including an endless chain connecting a drive sprocket on a crankshaft to a driven sprocket on a camshaft.

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新型环锭纺机利用弹性元件和干衡凸轮来替代传统用的重锤，以平衡升降部件的大部分自重，其中有用扭杆的，也有用螺旋圈簧的。

In new type ring frames, elastic members and balancing cams are used to replace the traditional dead weights for the balancing of the ring rails and other lifting parts.

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变焦系统凸轮曲线设计是变焦系统后期设计过程中十分重要的一环，曲线设计的好坏直接关系到系统最后像面的稳定程度。

Zoom system Cam design is an important step of the later stage design of a zoom system. The quality of the curve design is directly related with the stability of the final image surface of the system.

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