The sun 's rays could not wedge their way through the barrage of foliage . A barrier set up in a bridge router or gateway to filter packets of data based on the data type or destination .

阳光透不过树叶的 屏障。在网桥、路由器或网关上设置的一种屏障，它将根据数据类型或目的地对数据包进行 过滤。

The general rule and the way for using the wedge filter

楔形 滤 板的使用原理和方法

The presence of wedge filter in the photo field will cause the change of beam quality which results in the modification of depth dose distribution comparing with that in the open field .

光子 照射野中引入 楔形 滤片将导致射线辐射质发生改变，继而使 楔形野与平野相比，深度剂量发生改变。