IS: 1448 [P - 4] - 1984 (Reaffirmed 1989); Methods of test for petroleum and its products Part 4 Ash, sulpated ash and water soluble ash

IS: 1448 [P - 4] - 1984 (Reaffirmed 1989); Methods of test for petroleum and its products Part 4 Ash, sulpated ash and water soluble ash - New Delhi BIS 1984 - 10p

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