A controller can complete the timing switching and fault switching for units. It also centralizes the management which is convenient for air conditioning system.

并且机组控制器可完成各机组间的定时切换及故障切换，同时便于空调系统的集中管理。

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Moreover, as a concession to e-tailers, fed up with paying for charge-backs they believe are not their fault, it is switching liability from retailers to issuing banks.

ECONOMIST: Paying online