基本解释聚氨酯橡胶同根派生 urethanes相关词英汉例句Silicones and urethanes are by far the leading sealant products followed by latex and butyl rubber.到目前为止密封剂产品主要是硅树脂和聚氨酯橡胶,其次是乳胶和丁基橡胶。urethanes更多例句