The new visbreaking process with de - oiled asphalt feedstock is discussed.论述了以脱油沥青为原料的减粘裂化新工艺.Hydrogen is an important feedstock used in petrochemical enterprises � � hydrogenation process.氢气是石化企业加氢工艺的重要原料.The product m...
之前尚无尿黑酸尿病人合并胸椎脊髓病的报道.Thoracic myelopathy in a patient with alkaptonuria has not been previously reported.目的:探讨青少年胸椎椎弓根影像学特征及其临床意义.To evaluate the imaging and clinical character of teenage thoracic pedicle.目的探讨胸椎结核的手术方法和治...