taper pin-hole

例句：

1. 1.The camera has a very small taper pin hole.
   这台相机有一个非常小的缩口针孔。
2. 2. The scientist used a tapered pin hole to study the behavior of the molecules.
   科学家使用一个缩口针孔来研究分子的行为。
3. 3.The tapered pin hole was used as a keyhole for the lock.
   缩口针孔被用作锁的钥匙孔。