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 / ____||   / _ \\   |__  //    / _ \\   /_____// 
/ //---`'  / //\ \\    / //    | / \ ||  `____ `  
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  `----`  `-`   `-`  `-----`    `---`    /_//     
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發送短信 : Properties of binder-bentonite-sand for construction of seepage cut-off walls