射线通过一个小孔进入盒子，从而集中成一束。就像以前的针孔照相机。

X-rays enter the box through a small hole that in turn focuses them, like an old-fashioned pinhole camera.

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北京艺术家史国瑞是一位归根学派的实践者，他使用针孔照相机来拍摄当代中国。

Pekinese artist, Shi Guorui is a follower of the return to the roots, who uses the technique of the pinhole to photograph contemporary China.

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用在弹头上安装针孔照相机的方法，并借助一个频闪平行光源，能够直接记录攻角——时间变化曲线。

The method of pinhole camera which is set up at the cone of a projectile, can record the yaw-time curve directly by a frequency-flash parallel light.

youdao

用在弹头上安装针孔照相机的方法，并借助一个频闪平行光源，能够直接记录攻角——时间变化曲线。

The method of pinhole camera which is set up at the cone of a projectile, can record the yaw-time curve directly by a frequency-flash parallel light.

youdao