I've read and read and read and I still do not have a clear idea what it really is that trains do. Do they just "speed" up production of certain facilities? Most facilities produce faster than 3-7 days, so that doesn't seem to make sense. I even asked a friend how they work and she took the time to explain, in detail, and I didn't have the nerve to tell her that she had shed no more light on exactly how they work than the existing information.
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