It is, in fact, a very important element in our sales pitch.
这是，事实上，在我们的推销非常重要的因素。
It is the difference between theoretical normal pitch and its actual measured value. The major element to influence the pitch errors is the runout of gear flank groove.
推测的法向周节与实际测量值不同。影响周节错误的最主要因素是齿轮侧面有凹槽。
Pyrolysis process of the modified coal tar pitch is studied using FT IR and element analysis, respectively.
采用FT - IR和元素分析研究改性煤沥青的热解过程。
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