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. 產(chǎn)品周?chē)臍怏w由真空泵抽成真空后，可根據客戶(hù)要求充氮氣或混合氣體，以實(shí)現更長(cháng)的保質(zhì)期。
The invention discloses a three-chamber continuous crystal whisker generation vacuum furnace for continuously preparing silicon carbide whiskers. 本發(fā)明公開(kāi)了一種連續制備碳化硅晶須的三室連續晶須生成真空爐。
Exclusion of air creates a vacuum in the bottle. 瓶子里的空氣排除后就產(chǎn)生真空。
