Take us up to periscope depth .

我们要升到潜望镜的深度.

Anything on radar that looks very small ? Lifeboat , periscope , anything ?

在雷达上侦测到任何小东西吗？像是救生艇或潜望镜吗？

Partly a discovery center , the facility offers hands-on opportunities to help blow glass in front of three piping hot furnaces and look at neat uses for glass : a prism and a periscope that pops through the ceiling .

该博物馆在一定程度上是一个探索中心，人们可以在三个滚烫的熔炉面前亲手协助玻璃吹制，还可观看玻璃简单用途：天花板上垂下的棱镜和潜望镜。