观察油面的玻窗或玻管

英语翻译

oil-gauge glass

拓展翻译

观察
observe; survey; espial; look into; watch
observation
observation; view
observation; take stock of

观察板
observation board

观察病室
observation ward

观察窗
observation window

观察窗口
watch window

观察的
observational

观察地带
observing zone

观察点
observation point; view point

观察读数
observed reading

观察法
observational method

观察管
observing tubes

观察井
observation well

观察镜
sight glasses

观察矩阵
observation matrix

观察距离
viewing distance

观察孔
peep door

观察模式
observation pattern; observing pattern

观察目镜
working ocular

观察屏
viewing screen

观察日
term day