length of column charge 柱装药长度

effective length of column 柱的有效长度

critical length of column 临界桩长

calculation length of column 柱子计算长度

length of gas column 气塞长度

Length of air column 空气柱长度

length of dynamite column 药柱长度

effective length factor of column 柱计算长度系数

length of filled water column 充实水柱长度

length-width ratio of column limb 柱肢长宽比