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CR氯丁膠

CR氯丁膠

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氯丁橡膠（Neoprene）CR，又名氯丁二烯橡膠，新平橡膠。由氯丁二烯（即2-氯-1,3-丁二烯）為主要原料進行α-聚合而生產的合成橡膠，被廣泛應用于抗風化產品、粘膠鞋底、涂料和火箭燃料。

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久久影院午夜理论片无码_少妇人妻在线视频_成人av无码一区二区三区_波兰女人毛茸茸

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