Best commercial equipment used to measure bomb type 2 compounds, 4, 6-trinitrotoluene (TNT), hexahydro-1, 3, 5-trinitro-1, 3, 5-triazine (RDX), 2, 4-dinitrotoluene (2, 4-DNT) and 6-dinitrotoluene, (2, 6-DNT), which is an explosive compound that is commonly used from the original. Relying on the work of the head sensor measuring surface sound waves, the working principle is similar to the sound of waves to change the QCM is the frequency of the molecules to be catch of the explosive compound it on the sensor.
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