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美国科学家最近研制出一种新型防噪音建材,用该建材建成的房子可以隔音,不受外界的干扰。这种新型防噪音建材是由许多空心塑料小球组成的。这些小球带有很多极细微的小孔,能够消除从洗
US scientists recently developed a new type of noise-proof building materials, built with the building materials can be soundproof house, without interference from the outside world. This new anti-noise building material is composed of many hollow plastic pellets. These balls have many tiny holes to eliminate the wash