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“Blow and go” refers to the act of completing a task quickly so one can move to the next task. The origin relates to the building of the [transcontinental railroad] where railroad teams used [explosives] to blow tunnels through the Sierra Nevada Mountains to lay track. More recent railroad references relate to performing a brake test before a [locomotive] departs a rail yard. The conductor will receive a “blow and go” before departing after the test has been performed.
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