一1969年,发生在中俄边界的珍宝岛战斗打响了,苏军以其先进的T62坦克横冲直撞,耀武扬威,对此,我军的各种口径反坦克炮均无法应对它的威胁,研制新型穿甲弹、破甲弹迫在眉睫。研制过程中,要求穿甲弹、破甲弹击穿不同厚度的钢板,初速应该是多少?炮弹接触钢板时瞬间产生 In 1969, the battle of Zhenbao Island, which took place on the Sino-Russian border, started. The Soviet army, with its advanced T62 tanks, collided and made great strides. In response, all kinds of anti-tank guns of our armed forces were unable to cope with its threat and developed a new type of armored missile , Armor bullet is imminent. During the development process, armor-piercing bullets and armor-piercing bullets are required to penetrate steel plates of different thicknesses, and what is the muzzle velocity?