SLSn.设定位置组号(位置组号设定与转移；旁瓣抑制)SLabbr.透镜分光计(=lens spectrometer)abbr.海平面(=sea level)sliding gearn.滑动齿轮sliding shot滑倒射门sliding flap滑动瓣sliding step滑步sliding disc滑动底盘slid marking滑迹sliding roofn.(车身)滑顶sliding ring滑环sliding yoke滑叉,游动叉slewing crab悬臂式吊车