What is a dry point?
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What exactly does “do something concrete” mean? Could those who know answer in detail?
Are you referring to dry contacts? It’s the relay; the relay contacts handle passive signals
The dry point is the temperature at which, during the distillation of oil, the temperature instead of rising decreases; it is equivalent to the final boiling point
Dry point (KK): The point at which the distillation of a oil continues until the highest vapor temperature is reached is known as the distillation point or dry point. Example: The dry point is determined by placing 100 milliliters of gasoline in a small flask equipped with a side tube, inserting a thermometer, and carrying out heating distillation. The temperature indicated by the thermometer at the moment the first drop of oil is distilled is called the initial boiling point. The temperature when the volume of the distilled liquid reaches 10 milliliters is called the 10% point; similarly, the 20% point, 30% point, and so on can be determined, until finally the temperature at which the last drop of oil is distilled is reached – this is the dry point