Mid-work parts washer

I want to find a washer that looks and funcitons similar to a car washer. I have a train of parts that all need to be washed and I know that to do that efficiently the best way would be to keep them on the carts they are conveyed on and wash them there. Has anybody ever heard of a type of a parts washer that would do this? Somebody told me that it was called a mid-work parts washer but I googled it and couldnt find an example.