| N | O | Al | Si | Cr | Fe | Mn | Ca |
A | 6.04 | 20.73 | 24.46 | 8.84 | 32.45 | 2.34 | 5.20 | 0.31 |
B | 17.70 | 4.21 | 32.88 | 0.95 | 42.65 | 1.61 |
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