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To bring the pressure down to this value, one must ...

This will heat the thermistor enough to lower (or decrease, or reduce, or diminish, or cut) the resistance to 200 ohms.

The transformer is suitable for stepping down (or reducing, or decreasing) the supply voltage to 85 volts on open circuit.

Источник: Русско-английский научно-технический словарь на Gufo.me