权威例句
Folding doorFolding doorFolding doorFrost control system for high-speed horizontal folding doorsDouble acting spring hinge for folding doorsFolding door for garagesFolding door pivot pin retainersAcoustic type folding door with separate cover sectionsDOOR LEAF GUIDING ASSEMBLY OF A STACKING SYSTEM FOR LATERALLY FOLDING DOORSTrolley for a sliding or folding doorBi-folding doors for air distribution plenumFolding door for office cubicleThrust recovery outflow valve with a single bi-fold door and method of controlling aircraft cabin pressure
