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联邦德国化学专家发现液态聚合物——聚丁二烯和砂子混合在一起,可以制得宛如石头般的建筑材料,其强度取决于聚合物的数量。这种建筑材料的比例为:聚丁二烯
Federal-German chemical experts have discovered that the liquid polymer, polybutadiene, and sand are mixed together to produce a stone-like construction material whose strength depends on the amount of polymer. The proportion of this building material is: polybutadiene