Inside equipments we may have a source of ignition for example a running agitator with a mechanical failure.

高压反应釜但是设备内部也许会有火源的存在，例如，搅拌器搅拌时出现机械故障。

youdao

To exclude higher oxygen concentration in an equipment with an potential source of ignition we use Nitrogen to dilute the air in the vessel.

避免设备内氧气浓度过高以及火源的存在，使用氮气稀释釜内空气。

youdao

Personnel should stay in a well-ventilated area and avoid any source of ignition until their clothing is completely free of any excess oxygen.

人员应一直呆在通风良好的区域，避开任何火源，直到他们的衣物彻底没有任何多余的氧为止。

youdao

As part of their investigation, Japanese and U.S. experts want to determine if an internal battery failure, or defective lithium-ion cell, was the ignition source in either of the two incidents.

WSJ: All Boeing Dreamliners Are Grounded