Sacramento Fire Department (California, USA)萨克拉门托消防局(美国加利福尼亚州) Semiautonomous Flight Director半自治的飞行指挥员 Single Family Dwelling单一家庭的住宅 Saudi Fund for Development沙特开发基金会 Shear Force Diagram剪力图 Sudden Frequency Deviation突变频率偏差 Swing Fire Door门摆动 Sampling Frequency Detector采样频率探测器 Standard Finite Difference水平有限差分法 Sorsby's Fundus DystrophySorsby的眼底萎缩 System Functional Diagram系统功能的图 Simplified Flow Diagram简化流程图 Start of Frame Delimiter (networking)分隔符(联网的框架) Saturation Flux Density (satellite communications)饱和磁通密度(卫星通讯) Shepherdstown Fire Department (Shepherdstown, WV)Shepherdstown消防局(Shepherdstown性