vent-hole

So often easily design overflow and air vent at inappropriate location, making casting generated gas hole.

所以常常容易因为溢流井与逃气道位置设计不当，使得铸件产生气孔的缺陷。

I know not what vent-hole daylight habitually illumined his soul.

我不知道是怎样一种黯淡的光经常照着他的心.

The methods of inlet channel of laval nozzle and smaller area of vent hole have been put forward to limit the spin rate of turbine generator.

提出选用拉伐尔管式进气道、和较小的排气孔面积的方法来限制涡轮发电机的转速。

The sky is but a vent-hole.

天好象是暗室中的透光眼.

The second positioning piece is arranged within the hollow tube in adjacency to the air vent, and includes a second punch hole communicated with the air vent.

一第二定位件，设置于所述中空管体内邻近所述出气口处，并包括一与所述出气口相连通的第二穿孔；