lengthwaysadv.纵向地；纵长地lengthn.长度；时间长短；距离；一段；距离的测量单位length-width ratio of discharge outlet排放口长宽比length-to-diameter ratio of cylinder圆筒长径比Length-diameter ratio of spray orifice喷孔长径比length measuring machine measuring machine测长机length of data-directed transmission field数据定向传输字段长度lengthways-single-sheath-thermal-couple纵向单屏蔽滞止式温度传感器