但摩擦力(滞后作用)可以保证更平稳地完成油门设定，并缓解在持续挤压弹簧过程中产生的张力。
But the friction (hysteresis) makes it easier to maintain a steady throttle setting, and relieves strain from pushing against the spring continuously.
锯链的驱动张力是驱动力与切削阻力及摩擦阻力相对抗而产生的，在不同位置其大小不等。
Drive tension is caused by resistance of driving force and cutting resistance and frictional resistance and it is not the same value at different places.
对拉丝工艺中的反张力与界面摩擦系数及产品性能间的关系作了理论和实践方面的详细论述。
In this article, relations among reverse tension, friction coefficient and quality of wire are discussed in theory and practice of cold drawing process in detail.
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