特殊用法axle sag1.轴下垂, 轴下垂度bomb sag1.【地质】火山弹沉降core sag1.砂芯下沉, (湿强度不够引起的)沉芯erection sag1.安装垂度tilt sag1.倾斜下陷unloaded sag1.无载垂度sag of beam1.梁挠度sag of cable1.电缆垂度, 缆索垂度sag of line1.电线垂度sag of the span1.架空明线的垂度