This article is a study of methylene chloride as a substitute for trichloro-fluoromethane in producing flexible polyurethane foam.
讨论了用二代一氟三进行软氨酯泡沫塑料的生产。
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Unfortunately, the polyurethane foam he used is inherently unstable.
不幸是，他氨酯泡沫天生不稳定。
Polyurethane foam sealant was used during construction at the first floor underground, releasing flammable gases that accumulated to reach combustible conditions.
地下一层施工作业氨酯泡沫填缝剂时，释放易燃气体局部积达到可燃条件。
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详细解释
代一氟三
氨酯泡沫塑料的生产。
是，他
客集
