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looking-glass | |||
sight class; optical viewer; prism window | |||
peep hole | |||
glass wall | |||
sight port; sight glass window | |||
observation window | |||
sight glass; window | |||
viewing window | |||
sight flow glass | |||
porthole; viewing port | |||
glass | |||
inspection window; observation panel; sight window; vision light | |||
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glass; window | |||
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inspection window | |||
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inspection port | |||
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sighting port | |||
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viewing window |
观察窗 : 34 phrases in 13 subjects |
Automobiles | 3 |
Aviation | 4 |
Chemistry | 1 |
Drilling | 1 |
Electronics | 2 |
Metallurgy | 2 |
Oil / petroleum | 3 |
Rail transport | 2 |
Refrigeration | 2 |
Space | 2 |
Submarines | 1 |
Technology | 8 |
Wind Energy | 3 |