「ポンプが2台とも動いてたときは、洗車場の機械室で話してもお互いの声がほとんど聞こえなかった。」を英語で言うと
英語では
We could barely hear each other in the car wash equipment room while both pumps were running.
英語では
We could barely hear each other in the car wash equipment room while both pumps were running.