Bon Jour from MI - USA

sanırım üstünde potansiyemetre olan ufak bir arabadan bahsediyor. yüksek gerilim ise doğru olabilir

In Turkish technical jargon, there are many components that are called "araba". Basically, any part of a machine that moves on a rail-like structure can be named "araba", whether it has wheels or not. I am making my suggestion based on my professional technical experience. Although I have no solid grounds to claim that it is correct, it can be understood by the readers of the translation. Search engine results are promising.