There was no need for the firemen to uncouple a line of hose from the reel.
Tell Pedro the moment he hears the bell ring to uncouple the rear car.
It will then uncouple, discharge one hopper, and go back on Mass-Time.
I've got to get to the rear now, to uncouple a car we have to leave here.
Andrews told his engineer to uncouple the baggage car from the box car, and then wait ...