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| oil solution type | interval | equation P (MPa) B. N. ( – ) | the ratio of the slope of the 2nd interval relative to the 1st interval slope (%) |
|---|---|---|---|
| without nanoparticles | 1st interval | B.N. = 0.0687P + 0.9224 | 82.78 |
| 2nd interval | B.N. = 0.0187P + 1.2878 | ||
| with nanoparticles | 1st interval | B.N. = 0.0746P + 0.9064 | 44.78 |
| 2nd interval | B.N. = 0.0412P + 1.1590 |
