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| mineralogy The science which concerns the study of natural inorganic substances called minerals | |||
| علم المعادن: 1 phrase in 1 subject |
| Oil / petroleum | 1 |
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| |||
| mineralogy The science which concerns the study of natural inorganic substances called minerals | |||
| علم المعادن: 1 phrase in 1 subject |
| Oil / petroleum | 1 |