| http://www.w3.org/ns/prov#value | - FIG. 8 is a continuous real-time acoustic spectra for a remote sensing distance of 1.8 m, a laser line of 10.6 P (20), a laser power of 1.5 W, a SF6 gas leak rate of 20 sccm, and acoustic frequencies of 1.2 kHz, 3.8 kHz, 4.9 kHz, and 6 kHz.
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