The prototype still had one moving part, a ball valve, and was big and clumsy. Eventually the design was improved and their cooling solution was a world sensation. Albert Einstein once mentioned how astonished he was by their ingenious solution.
The prototype still had one moving part, a ball valve, and was bulky and awkward. Eventually the design was refined, and their cooling solution became a global phenomenon. Albert Einstein remarked on how amazed he was by their ingenious solution.