أرسل هذا في رسالة قصيرة: STUDY OF HYBRID FIBER REACTIVE POWDER CONCRETE CHARACTERISTICS WITH VARIATIONS OF MICRO POLYPROPYLENE FIBER AND STEEL FIBER CONTENT

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 /_   _//  /_   _//  | \| ||  \ \\/ // | \  / || 
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 /__//     /_____//  |_|\_||    |_||   |_|\/|_|| 
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