Ignition timing devices. The contact points must be timed to close and open in proper relation to the piston positions in the cylinders.

点火正时装置：触点必须能够在活塞处于气缸中相关位置时，按时关闭和开启。

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Ignition timing devices. The contact points must be timed to close and open in proper relation to the piston positions in the cylinders.

点火正时装置：触点必须能够在活塞处于气缸中相关位置时，按时关闭和开启。

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