Ostan纯氢氧化钠OSTabbr.科学与技术处(=office of science and technology)abbr.作战适用性试验(=operational suitability testing)Ostreopsis siamensisn.暹罗蛎甲藻osteoepiphyseal line骨骺线Osteotomy of patella髌切骨术Osteoclasis of femur股骨折骨术osteological disease骨科疾病Ostwald viscosimeter奥斯托惠尔粘度计,奥斯瓦尔特粘度计,奥氏粘度计Osteoplasty of tibia胫骨成形术Osteotomy of humerus肱切骨术osteochondral injury骨软骨损伤ostensibly detection表观检测