平面镜、凸透镜和凹透镜。

Plane mirrors, convex lens and concave lens.

简单的潜望镜使用平面镜。

A simple periscope USES mirrors.

除此之外，每个木桶的前面都有一个平面镜，可以看到木桶中详细物品的情况。

To top it off, these buckets each have a shiny display panel on the front that gives detailed information about any item in the bucket.

对于平面镜这肯定是对的，但是对于其它形状的反射镜则情况只是近似如此。

This is certainly true for a plane mirror but it is only approximately the case for other configurations.

采用毛毡抛光片和新的装夹方法加工平面光学零件，可实现中低等精度平面镜古典法高效抛光。

Using new technology to make plane optical parts with felt polishing pads and new flocking method, the plane optical parts with low or medium accuracy can be efficiently polished in the classical way.