American airborne recoilless rifles have their setup times reduced to enable them to fire more effectively at moving vehicles 美军空降兵无坐力炮架设时间降低，以使其能更加有效地射击移动中的车辆。
2.
A physic model is established for the description of the vibration of mini - spring of the brushing exploding mechanism in the fuse of the grenade lunching from a recoilless gun 摘要对无后坐炮发射时火箭弹中引信擦地炸机构微小弹簧的运动进行了动力学分析。
