After all of the air inside vessel is vacuumed by a specific vacuum pump, it can also fill Nitrogen or other gases to ensure a longer life of products. 产品周围的气体由真空泵抽成真空后，可根据客户要求充氮气或混合气体，以实现更长的保质期。
The invention discloses a three-chamber continuous crystal whisker generation vacuum furnace for continuously preparing silicon carbide whiskers. 本发明公开了一种连续制备碳化硅晶须的三室连续晶须生成真空炉。
Exclusion of air creates a vacuum in the bottle. 瓶子里的空气排除后就产生真空。
