qián​wàng​jìng

periscope

潜望镜 潛望鏡 qián​wàng​jìng
periscope
an optical instrument consisting of a series of lenses and mirrors, used in submarines or underground fortifications to observe things above the surface of the water or ground

Frequency

Movie subtitles
0.360 per million appears in 0% of films
Written text
0.281 per million

Sources