opening

1.   проём, отверстие; щель; зазор; просвет

2.   зев (ключа)

3.   раскрытие (шва, щёк)

4.   калибр (валка)

5.   открытие (клапана и т. д.)

6.   начало (работ и т. п.)

- opening of bids

- access opening

- beam opening

- booth front opening

- bridge opening

- bridge waterway opening

- discharge opening

- door opening

- effective opening

- exhaust opening

- face opening of exhaust hood

- feed opening

- flare opening

- floor opening

- formal opening

- gate opening

- hood inlet opening

- inlet opening

- intake opening

- jaw opening

- observation opening

- outlet opening

- outside air opening

- spillway opening

- suction opening

- supply air opening

- valve opening

- ventilation opening

- window opening