Factory services like compressed air and steam systems are classic examples of functions that are only noticed when they go wrong. Nowadays, like - thankfully - modern cars, these systems can be relied upon to work consistently. But - also like cars - this reliability often means that failures are more painful, because you're less well prepared. And, while your car not starting in the morning just means you'll be late for work, your air or steam supply failing will usually have a catastrophic effect on the entire operation.
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