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
Osteoclasis of femur股骨折骨术
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
osteochondral injury骨软骨损伤