The （） is a crystal which, under pressure, produces an electric current which varies with the pressure.<br>A:alternator<br>B:glass thermometer<br>C:burdon tube<br>D:piezoelectric pressure transducer

The （） is a crystal which, under pressure, produces an electric current which varies with the pressure.
A:alternator
B:glass thermometer
C:burdon tube
D:piezoelectric pressure transducer

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