cdr突然打开空白:Closed-Cell Polyurethane Foam

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Closed-Cell Polyurethane Foam closed cell neoprene foam怎样翻译呀？ connection closed connection closed 是什么意思啊 closed transactions如何翻译？？ Problem 1. CLOSED FENCES 什么是case closed Connection closed 什么意思？ 翻译：cell-phone. 英语cell phone 是什么意思?