SLGn.交换机二次网络群SLabbr.透镜分光计(=lens spectrometer)abbr.海平面(=sea level)sliding rail滑道slibar fence网状挡车栅栏sliding seat滑动座sliding doorn.拉门；滑门slung-load吊挂sliding wear滑动磨损sliding plug滑动塞slicing line切片作业线Slub Muhiple竹节粗度sliding axlen.滑动轴