guiding and current bar
/ˈɡaɪdɪŋ and ˈkʌɹənt ˈbɑː/
n
English · guiding and current bar中文 · 导向电流轨Español · raíl eléctricoFrançais · barre de guidage et de prise de courant
意味：Metal bar against which the guiding tire rolls; it also supplies the traction current.