brich n. 桦树
- The annual growth of diameter of unit area increased along with the density descending of the polar and brich forests.
山杨林和白桦林单位面积胸径年生长量随经营密度的增加而减少; - Result shows that birch forest type was unstable, and a good natural regeneration occurred when the brich stand was surrounded by secondary forests.
结果表明,白桦林是一个不稳定的次生林型,在大片次生林中的白桦林天然更新非常好,现在硬阔已进入演替层; - This paper introduces the application effects of air cooling and preheating and standard tuyere brich as well as double air box tornado on the cupola.
介绍了空冷、预热、标准化风口砖及双风箱龙卷风供风在冲天炉上应用的效果;
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