MACHINES & CITY SYSTEMS
Mechanical City Gauges
They show what pipes are doing, except when one decides conditions are permanently excellent.
Mechanical gauges turn invisible pressure into a visible needle reading. Older gauges can stick or drift.
One Lower Quarter gauge showed the same safe reading at low, normal and zero pressure. Disconnected from the pipe, it remained confident.
Suspicious gauges should be compared with known references, not hit.
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