The fire zones are generally divided into five zones: flame zone, high temperature thermal plumes zone, fresh air supplement zone, transitional zone and "inertzone".
一般可分为燃烧区、新鲜空气补充区、烟气流区、过渡区和火焰后面的“惰化区”五区。
2
The conversion zone is continuously purged, preferably with an inert gas such as nitrogen.
转换区不断清除最好的惰性气体，如氮。
3
Surface roughness of hardened zone of the ball head pin has been improved on by the use of inert gas …