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由于汽车发动机周围的工作环境恶劣,所以与其配合工作的起动机等必须满足耐冲击、耐振动等严格的设计要求,它们的工作必须非常可靠。实践证明许多汽车不能起动,常因起动机的电磁开关产生故障。电磁开关的桥接片一旦与固定触点因某种原因而粘连,起动电流便无法断开。因此,电磁开关不仅要连接可靠,更要能可靠地断开供给起动的电流。不仅如此.
Due to the poor working environment around the engine of an automobile, the starting machines which cooperate with it must meet the strict design requirements of impact resistance, vibration resistance and the like, and their work must be very reliable. Practice has proved that many cars can not start, often due to starter magnet switch failure. Electromagnetic switch bridge with fixed contacts for some reason, the adhesion, the starting current can not be disconnected. Therefore, the electromagnetic switch not only to connect reliable, but also to be able to reliably disconnect the supply start-up current. Not only that.