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 |  _ \\    / _ \\  | \  / ||  /_   _//  / ____|| 
 | |_| ||  | / \ || |  \/  ||   -| ||-  / //---`' 
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 `-` --`    `---`   `-`  `-`   `-----`    `----`

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發送短信 : Acoustic wave in piezoelectric coupled plates with open circuit