According to the demands of ball mill coal pulverized system, inverse matrix decoupling theory, a traditional decoupling method, is used in the system control, and a PID controller is designed.

本文首先根据中储式球磨机制粉系统对控制精度要求不高的特点，将传统解耦方法中的逆矩阵方法应用于制粉系统解耦中，设计了基于逆矩阵静态解耦的PID控制系统。

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The South Korean mill earlier this year agreed to buy as much as 15 percent of the Roy Hill iron ore project in Australia and a 7.8 percent stake in a coal mine in Mozambique.

今年年初，Posco同意购买澳大利亚Roy Hill铁矿石项目15%的股份，并且在墨尔本的一家煤矿中也占有7.8%的股份。

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This paper briefly describes the present situation of sound insulation ways universally adopted in steel ball coal mill and the noise intensity released during operation.

简述目前钢球磨煤机普遍采用的隔声方式及其运行过程中释放噪声强度的现状。

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Daw Mill staff fear if UK Coal went into voluntary liquidation, workers could receive state payouts instead of enhanced benefits if they were not transferred over to a new company.

BBC: Daw Mill miners wait to hear about benefits

Last week UK Coal said it needed to shut Daw Mill Colliery because of a ferocious fire which showed no signs of stopping.

BBC: Minister promises to help Daw Mill miners

The future of the Daw Mill colliery in Warwickshire remains under threat despite major changes at mining company UK Coal.

BBC: Daw Mill mine in Warwickshire remains 'under threat'