Translation of "Trolley" in Japanese

Look, you see there's a trolley there.

トロリーがあるぞ

That... is all that remains of that trolley system.

トロリーのシステムで 残(のこ)ったのは― これだけだ

If we use this trolley and this line it keeps us on that correct direction of travel.

トロリーと線を使(つか)えば 正しい方向(ほうこう)に進める