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In a closed loop liquid level system, the controller receives a feedback signal from the level sensor and compares it to the SP to determine if any __________ exists.
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In a closed loop liquid level system, the controller receives a feedback signal from the level sensor and compares it to the SP to determine if any __________ exists.

User Sunqiang
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In a closed loop liquid level system, the controller receives a feedback signal from the level sensor and compares it to the SP to determine if any similarity-PV-signal exists.

User Ymin Hu
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