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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.Private User user2;此役堪称诡异，诡异之处有三。This case is terrible. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . First of all, it will affect the good mood of the landlord after work.该剧主要讲述从身任警方卧底成功捣毁黑帮后重返警局的警员高家声（林峯饰）、PTU女沙展何慧玲（蔡卓妍饰）和铁面无私的队长刘建晖（方中信饰）为主人公进行展开的故事。三人在PTU虽然有误会、矛盾与冲突，但在执行任务、面对瞬间生死后，逐渐建立起真正的同僚友谊，成为了真正的好警察。2. How to link up strategic planning with or strategic implementation?Baseball