recessed thread截短牙廓
recessed luminary隐藏的照明器
recessed connector凹头插座
coil recessed顶棚内安装
Recessed Frame下凹框
recessed terminus凹端
recessed pointing凹灰缝
Recessed marking球表面的小凹
recessed anchor全收穴锚
ADJ（形容词） If something such as a door or window is recessed, it is set into the wall that surrounds it. (门或窗)置于墙内凹陷处的; 嵌入墙里的
...a wide passage, lit from one side by recessed windows.
...一边有凹窗、光线可以照射进来的宽敞走廊。