In the interior ballistic cycle of regenerative liquid propellant gun, in addition to motionofprojectile, there exists motionof piston compressing the liquid propellant.
再生式液体发射药火炮在内弹道循环中，膛内除弹丸运动外，还存在活塞压缩液体燃料的运动。
2
The mass center motion equations of a damp-increasing range correction projectile were established by the concept of damp-increasing coefficients.
用增阻系数的概念，建立了增阻式射程弹道修正弹的质心运动方程组。
3
Similar flat parabolic motion and types ofprojectilemotion in the horizontal direction, regardless of how fast, in vertical direction of the displacement is certain.