Ruifeng electrical switch factory founded in 1991, specializing in the production of various types of low-voltage electronic switch, socket and USB.
瑞丰电控开关厂创建于1991年，专业生产各类低压电子开关，插座及US B座。
In sddition, compares them with early switch-board explains some improvements of the new type low voltage draw-out switch-board of out factory applied in metallurgical system.
阐述了新型低压抽屉式开关柜在冶金系统应用中的几点改进情况。
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