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季木霖站在客厅不动，眉头微蹙。他是认真学习经历过高考的男人，虽然有幸成为海事学院研究生，但从成绩排位上来看，他从未在最顶尖的部分中，按照现在的情况来看，大约每三年有300位左右的进士出世，每年100位上下，粗暴地与研究生或者高考进行对比，杨长帆连全国前1000都没进过。At that tail of the warhead, the drag armour-piercing firebomb is filled with a drag agent and a fireagent, Under the pressure of propellant propelling warhead, it will spontaneously ignite to produce open flame, So it can break through the oil drum and ignite or detonate the gasoline. However, the old-fashioned traced armour-piercing firebombs have obvious trajectories due to traced light when they are launched. Therefore, it is very easy to expose oneself while pointing targets to friendly forces. Therefore, the new tracer armour-piercing firebombs now equipped all start to burn and emit light only after the projectile flies out of the muzzle for a certain distance (the generally set safe distance is 100 meters, which makes it impossible for the enemy to judge the firing position with tracer ammunition, while targets within 100 meters do not need to be indicated by tracer), The principle is generally to ignite the tracer and combustion agent carried by the projectile by accumulating the heat generated by the warhead's friction with the air after flying for a certain distance to a certain extent.前几天，陈启送来稿子。老头儿如同兜头被浇了一盆冰水，热情骤降。