directly attached loop

例句：

1. 1. The engineer designed adirectly attached loop to connect the two piecesof metal together.
   工程师设计了一个直接附着的环状物来将两块金属连接在一起。
2. 2. The loop was used as a safetydevice during the construction process.
   在施工过程中，这个环状物被用作安全装置。
3. 3.The loop was securely fastened to thewall with screws and nails.
   这个环状物用螺丝和钉子牢固地固定在墙上。