observation mirror
... observation 观察,检查,监视 observation mirror 观测镜 observation port 观察孔,监视孔 ...
Spotting scope
... Spotter 观测手 Spotting scope 观测镜 Square butt 方形握把 ...
detectoscope
... desert amethyst 丢弃紫晶 detectoscope 观测镜 deutscher diamond 德国钻石 ...
periscope
... peripheralvascularclamp外周血管夹 periscope潜望镜,观测镜 periscopiclens周视透镜 ...