pinhook

例句：

1. 1. The pinhole camera is a simple device that can capture images through a tiny hole.
   针孔相机是一种简单的装置，可以通过一个微小的孔洞捕捉图像。
2. 2.The artist used a pinhook to hang the painting on the wall.
   艺术家使用一个针扣将画挂在墙上。
3. 3.The pinhook was so tight that it held the key securely in place.
   针扣非常紧，将钥匙牢牢地固定在了那里。