本文以国产并条机为例，分析了并条机上须条与压力棒上摩擦力界的分布，并进一步推导出了须条对压力棒包围角度的最佳范围。
In this paper, friction field distribution between sliver and pressure bar on a homebred drawing frame is analyzed, and on this basis, the best range of contact arc is deduced.
分析了顶梳除具有梳理分离纤维丛尾端的作用外，同时形成附加摩擦力界，加强对分离纤维丛中浮游纤维的控制，以减少有效纤维的损伤。
Besides the functions of carding and separating fiber tail end, top comb can also form added friction fields that strengthen the control of float fibers to decrease fiber damage effectively.
鉴于负摩擦力对桩基础应用过程中的重要影响，桩基础的负摩擦力已经成为基础工程界的一个技术热点。
Due to the important infection in using foundation, the negative friction in pile has became one of the engineering skill focus.
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