The distributor spark advance arm was milled from a solid piece of brass. 经销商点火提前手臂被碾碎从一个坚实的一块黄铜。
A contact in the distributor; as the rotor turns its projecting arm contacts distributor points and current flows to the spark plugs. 分配器中的节点;转动体把联系着分配器和电流的突出的胳膊为活力塞。