对在加压氮气中金属铝粉的直接氮化和氧化铝粉的碳热还原氮化法制备氮化铝粉末进行了研究。
The preparation of aluminium nitride powder by means of direct nitridation under pressurized nitrogen atmosphere and carbothermal nitridation of alumina is studied.
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。
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。
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.
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