This article presents the content, method and process of auto engine starting system test. This paper introduces many means and circuits of no-load test, overall braking test and solenoid switch test.

提出了汽车发动机启动系统测试的内容、方法及步骤，介绍空载试验、全制动试验、电磁开关试验的方法和线路。

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This article introduces a new design plan of soft switch invert welding power source, which can almost get in soft switch state under no-load, short circuit or load.

提出了一种新的软开关逆变弧焊电源的设计方案，该方案基本上可实现空载、短路、燃弧全负载范围内的软开关状态。

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This article introduces a new design plan of soft switch invert welding power source, which can almost get in soft switch state under no-load, short circuit or load.

提出了一种新的软开关逆变弧焊电源的设计方案，该方案基本上可实现空载、短路、燃弧全负载范围内的软开关状态。

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