（门窗的）过梁构成门窗上部框架的平行梁木，并支持上面的构架

（门窗的）过梁构成门窗上部框架的平行梁木，并支持上面的构架的英文翻译

基本释义

• The horizontal beam that forms the upper member of a window or door frame and supports the structure above it.