polyurethane rigid foam的用法和樣例：
例句
- This paper deals with the production and properties of iso-pentane blown PU rigid foams,and safety control.
本文將詳細討論異戊烷發泡聚氨酯硬泡的生產和泡沫性能及安全控制。 - The relevant safety technique and the safety operaional procedures in cyclopentane blowing process of rigid polyurethane foam are introduced.
介紹了聚氨酯硬泡環戊烷發泡工藝中相關的安全技術和安全操作規程。
