1. Magnesium mine, salt mine , Bromine mine, Piezoelectric Crystal.

2. Series piezoelectric crystal sensor could detect this change sensitively.

3. High Q-value piezoelectric crystal transducer produces strong ultrasonic power.

4. Explain the characteristics of piezoelectric crystals and the factors relating to the resonant frequencies of a piezoelectric crystal, and the procedure of the pulse-echo method.

5. The array consisted of 8 piezoelectric crystal sensors, each coated with an adsorptive material with unselective, but different response characteristics.

6. An array containing 9 piezoelectric crystal sensors is used for the qualitative and quantitative analysis of ethanol vapor mixtures.

6. try its best to collect and create good sentences.

7. For the piezoelectric crystal, not only a mechanical source distribution at the surface, but an electrical source distribution also can excite the elastic wave fields.

8. OBJECTIVE To develop a piezoelectric crystal DNA sensor of Leishmania protozoan METHODS The DNA sensor was prepared by immobilizing DNA probe on surface of piezoelectric quartz crystal.

9. With piezoelectric crystal inductor, the sensitivity of stopping or missing pick is so high that instant stopping can be effected.

10. The invention provides a piezoelectric crystal gas sensor and preparation method thereof, belonging to the sensor preparation technical field.

11. The frequency counter has ben applied successfully to a piezoelectric crystal chemical sensor for determining SO_2 and organic vapours.

12. The much interference resulted in, the less response change of the piezoelectric crystal sensor of interaction.

13. The shear probe is a basic and essential tool for measurements of ocean turbulence and it is generally mounted with a piezoelectric crystal as a sensor.

14. Crystal Electronics Main Product information electronics industry ... indispensable basic components - quartz piezoelectric crystal element.

15. A computer controlled intelligent measurement and data acquisition system for piezoelectric crystal sensor array was studied.

16. In this paper, some properties of a strong-coupling exciton in piezoelectric crystal are studied.

17. A series of stress waves was successfully detected on explosive welding site, using piezoelectric crystal sensors pre positioned at different depth of soil anvil.

18. DDS technique is applied in this paper to design and carry out the piezoelectric crystal admittance circle measurement machine.