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11. 13. The measured by viscometer. 12. Fractional distillation device is used to ------ The boiling point of in petroleum mixture is cal initial boiling point while the boiling point is called fi: boiling point. 14. For heavy products, the temperatures a

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11. 13. The measured by viscometer. 12. Fractional distillation device is used to ------ The boiling point of in petroleum mixture is cal initial boiling point while the boiling point is called fi: boiling point. 14. For heavy products, the temperatures are reported at maximum

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