短语词组短语different root spread range 不同根幅Range spread 工资范围跨度;射距散布;工资范围跨越;距离扩展Target range spread 发散因子range spread echo sounder 量程扩展垂直探鱼仪range spread target 距离扩展目标range -spread target detection 距离扩展目标检测 返回 spread range