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I think it would be for working nursing mother to use a breast pump, rather then feeding an infant.
I appreciate the humour, when I was an engineman in New South Wales in Australia in the 1960-70's, our crack 200ton plus 38 class 4-6-2 was often run at 70mph, hand fired and no speedo, it was the drivers feel and knowledge along with his fob watch that was the speedometer.In this day and age, I am sure there would be requirements beyond what was needed when steam was common.I was thinking along the lines of communication, temperature sensors, water treatment etc and any gauges/controls applicable.Ted (Teditor) Freeman