negative strip(【技】在连铸过程中，当结晶器下振速度大于拉坯速度时，则铸坯相对于结晶器作向上运动，这种运动称之为负滑脱或负滑动。: In oscillating with negative strip, the friction alternates from positive (vertical tension on the shell) to negative (vertical compression) during each cycle. 在负滑脱振动时，每一振动周期内的摩擦力方向都是由正(铸坯壳受垂直张力)转变为负(铸坯壳受垂直压力)。)
negative strip time(① A more meaningful method of quantifying negative strip is to calculate the negative strip time, NSt. 定量表示负滑脱的一个更有意义方法是计算负滑脱时间 NSt。②The negative strip time (tₙ) is defined as the amount of time during the oscillation cycle when the mold travels in the cast direction at a greater velocity than the cast speed. 负滑脱时间的定义为：在一个振动周期内，结晶器在拉坯方向上以大于拉坯速度运动的时间。)
