门级以下瘤胃内最多的是拟杆菌、厚壁菌门、螺旋体和纤维菌门。
Bacteroidertes, Firmicutes, Spirochaetes, and Fibrobacteres were the most abundant in rumen under phyla level.
带动力实验进行洞壁干扰修正时，必须考虑螺旋桨滑流的影响。
The effect of propeller induced slipstream to the experiment data must be corrected.
此锅炉制造中最大的难点在于螺旋水冷壁，特别是其中过渡段的制造。
In production, the main difficulty is the manufacture of the evaporator spiral wall especially it's transition section.
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