Program Logic Controler (PLC) is applied in control system of cement production because of its credible performance, high ration of performance to price and simple and convenient maintenance.

可编程序控制器(PLC)其性能可靠、性价比高、维护简便，在水泥生产控制中得到了广泛的应用。

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One simple way to improve the situation may be to take our lead from the Michelin guide and oblige the agencies to ration their very best ratings.

FORBES: Rethinking Credit Ratings