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XRF结果。A：C1煤燃烧产物的XRF；B：K7煤燃烧产物的XRF；C：M30煤燃烧产物的XRF。
XRF results. A: Result of the C1 Coal combustion products XRF; B: Result of the K7 Coal combustion products XRF; C: Result of the M30 Coal combustion products XRF. XRF: X-ray fluorescence spectrometry.
