Unloading method of injecting nitrogen to tank car to raise pressure and liquid extraction with centrifugal pump simultaneously is often used to unload butadiene tank car.
丁二烯罐车卸车多采用氮气注入罐车加压，同时用离心泵抽液的卸车方法。
This device helps vent gas that boils off from the liquid oxygen tank, and also bathes the top of the tank in warmed nitrogen to prevent ice from forming.
这个装置有助于排除液氧燃料箱蒸发的气体，并且它还可以用加温氮气笼罩箱顶，以防结冰。
The paper expounds the necessity to use the nitrogen replaceable equipment in handling the problems with liquid-oil-gas-carrying tank cars by using nitrogen replaceable equipment;
论述处置液化石油气汽车槽车事故使用氮气置换的必要性及氮气置换装置的组成、工作原理；
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