王学昀 2021-05-23 02:50 发泡胶固化后的只能机械祛除(砂磨,小刀片),未固化前用专用的聚氨酯泡沫清洗剂。聚氨酯硬质泡沫是以异氰酸酯和聚醚为主要原料,在发泡剂、催化剂、阻燃剂等多种助剂的作用下,通过[详细]
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