The drive tool component (100) includes alternating flutes (104) and lobes (106) and has a conical section (108).
驱动工具部件(100)包括交替的凹槽(104)和凸齿(106)，并且具有锥形部分(108)。
The lower part, the conical section of the furnace and other fray easily area are covered with refractory to protect the heating surface.
炉膛下部锥段以下及炉内其它易磨损部位敷设耐火浇筑料，以保护受热面。
Problem is the most value conical section the key and difficult point for high school maths problem, is generally and other content combine comprehensive problem.
圆锥曲线最值问题是高中数学中的重点和难点问题，一般是和其他内容联合起来的综合题。
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