Avoid stem faces the wave. Keep an appropriate Angle between stem and wave, keep stern lean.
2
加氢裂化尾油粘度指数高，低硫、低氮、杂质含量少，倾点和粘度偏高。
The hydrocracking tail oil possesses the characteristics of higher viscosity index, pour point, viscosity and lower sulfur, nitrogen, impurity content.
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