SLDn.双倍左移(图纸的装箱单日；拉门；减速；螺线管)SLabbr.透镜分光计(=lens spectrometer)abbr.海平面(=sea level)slidingmode surface滑模面sliding crack model滑动裂纹模型sliding claw clutch滑动爪形离合器sliding plate valve滑板式换向阀sliding window IMRT动态调强slew-rate control转换速度控制sliding wedge chuck滑楔卡盘slude density index污染指数（SDI）sliding sluice gate滑动闸门sliding on wet road湿道滑行