nitrogen purging meaning in English

氮气吹尘
氮气吹扫

For liquid hydrogen system , helium purge is required after or before nitrogen purge
对于液氢系统用氮气吹扫之后，还要用氦气吹扫。
Petroleum and related products - preparation of a test portion of high - boiling liquids for the determination of water content - nitrogen purge method
石油和相关产品.水含量的测定用高沸腾液体的试验部分的准备.氮提纯法
Methods of test for petroleum and its products - petroleum and related products - preparation of a test portion of high - boiling liquids for the determination of water content - nitrogen purge method
石油和相关产品.水含量测定用高沸点流体试验区的准备.氮净化法