片语
Infrared observation window红外观察窗口
Door observation window门观察窗
inspection window[电][机] 观察窗;检查孔窗
observation time window观测时窗
Arc observation window弧光观测窗
viewing window观察窗;取景器
Lockout Observation Window锁定观察窗口
observation E window观察窗
quartz observation window石英玻璃窗
airtight observation window密闭观察窗
wide observation window宽观察窗