“牵引力”的英语？

他现在可以让它穿过他手指间滑动,不会让鱼感到一点儿牵引力.Now he could let it run through his fingers without the fist feeling any tension.被称为 “ 爬行”的表观滑动的大小取决于牵引力.The amount of apparent sliding, known as'creep ', is dependent upon the trac...