This paper presents system analysis on environment, self-operation mode and competition of domestic engaged services of sedan.

本文对中国轿车特约服务业的环境、自身运行方式和竞争形势等进行了系统分析。

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The methods of eliminating self - mode - locking and realizing single longitudinal mode operation in silicate glass laser is reported. The experimental results have been given.

本文报道在硅酸盐钕玻璃激光器中消除激光自锁模现象及实现单纵模运转的方法，并给出实验结果。

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Advantages and disadvantages are analyzed. It is pointed out that commercial operation mode should be selected reasonably in accordance with self -practical situations.

分析其各自的优缺点，指出电动汽车商业化运行模式应根据自身的实际情况，作合理的选择。

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