送纸采用电器转换开关控制，往复进给自动显示尺寸并有手动微调装置精度定位。
Reciprocating feeding paper was controled by the electrical appliance switch with automatic size display and manual fine tuning device with accuracy position.
介绍了一种可用于电喷发动机的LPG改装系统，系统设置了燃料转换开关来控制燃料的转换。
LPG bi-fuel system placed in the EFI engine is introduced in this article, the fuel change-over switch in the LPG system is to control the fuel conversion.
分析了静态转换开关（STS）的无环流切换控制的工作原理。
The control theory for static transfer switch(STS) without circulation current is elaborated.
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