This system cost lower, delay times shorter, switching speed faster, output volt-age accuracy higher.
系统成本低，延时短，开关速度快，输出电压精度高。
This system possesses features of lower cost, easier control.
该系统具有成本低、控制方便的特点。
This principle has rationity abviously in the perfect property right system, maintenance the party's property right benefits, lower the bargain cost etc.
该原则在完善物权体系、维护当事人物权利益、降低交易成本等方面具有重要作用。
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