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- gas ballast air 气镇空气
- The series H rotary piston vacuum pump is a sort of vacuum production eauipment suitable for pumping ordinary gases and conde nsable gases (when a gas ballast used). 一、H型系列滑阀式机械真空泵是抽除一般性气体或含有少量可凝性气体（此时应使用气镇）的真空获得设备之一。
- gas ballast pump = vented-exhaust mechanical pump 载气真空泵
- gas ballast roughing-holding pump 气镇粗抽泵
- His long speech was nothing but gas and hot air. 他的长篇大论只是吹牛和空话。
- There are several kinds of gas in the air. 空气中有几种气体。
- Containing air or other gas at a reduced pressure. 低压气体的在减弱的压强之下含有空气和其他气体的
- I'll refill my cigarette lighter with gas. 我将给打火机再灌满汽油。
- Exhaust gas has been incriminated in air pollution in cities. 废气已过视为城市空气污染的原因。
- The cylinder is getting too much gas and not enough air. 汽缸里汽油太多而空气不足。
- The gas bubbled to the surface of the water. 气体变成气泡升上水面。
- We are well served with gas in this town. 这个城镇煤气供应得很好。
- He cooks his meal with a gas stove. 他用煤气炉做饭。
- Don't forget to drop by at the gas station. 别忘了到煤气站去看看。
- I was given gas when they pulled my tooth out. 给我拔牙时用了一氧化二氮。
- The gas main explode and set fire to the house. 煤气总管爆炸引起房子失火。
- A vent to permit the escape of air or other gas. 气孔空气或其它气体通出的通道
- A whole tankful of gas dropped away because of the tiny leak. 由于这个小小的漏洞，整整一油箱的汽油都漏光了。
- We finally drove up to a gas station. 我们最后驶近一加油站。
- Frank rented out his gas station. 弗兰克把他的加油站租了出去。
