Final answer:
Pneumatic timers operate by restricting air flow through a diaphragm, while electric timers use an incompressible fluid and a rotating gear with an electric motor.
Explanation:
False. Pneumatic timers function by constraining air flow through an orifice to a rubber bellows or diaphragm. On the other hand, electric timers utilize an incompressible fluid and an electric motor with a rotating gear to control the valve.
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