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)sliding form design滑模设计sliding flue damper烟道活档sliding mesh method滑移网格法sliding-zone soil滑带土sliding timber weir插板堰sliding center sill滑动中梁sliding spool valve滑阀sliding condyle rod髁梁sliding dowel block滑块固定块slubbed wool fabric粗纺毛织物