On the basis of the sound absorption theory of Micro perforated plate proposed by Prof . Daa-You Maa, Danqun Fang successfully developed a series of micro-perforated plate mufflers, which was widely used for sound absorption.
2.
Film critic Jonathan Romney, while acknowledging the absorption theory, wrote As the ghostly butler Grady ( Philip Stone ) tells him during their chilling confrontation in the men's toilet,'You're the caretaker, sir.
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