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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.《读心探案》是一部刑侦社会剧，讲述新一代公安刑警，运用犯罪心理分析和网络时代新科技，刻画作案动机，侦破离奇疑难案件的故事，堪称一部当代犯罪心理侦破实录。ABC宣布续订《无言有爱》（Speechless）。Better Things 续订第四季　　Brandon（Jason Mitchell饰），一个有抱负有自信的年轻人，梦想着有一天能开一家自己的饭店，但是他对于新生活的承诺和对母亲以及在南区生活的弟弟的责任，似乎成为了这个梦想道路上的障碍。Jerrika（Tiffany Boone饰演），Brandon直言不讳的伴侣，她在努力让Brandon妈妈接受自己当儿子的女朋友，不过她为Brandon的选择是明智的。在当餐厅经理的她辛勤工作，就为了让Brandon离开街头幷成为一个大厨。在上一季结尾，原分子病毒已经接管了爱神星并威胁到整个太阳系的安全。此刻，一个更大的控制原分子病毒的阴谋被进一步揭开。与此同时，联合国副秘书长Avasarala和火星军人Bobbie Draper正试图说出真相，阻止一场地球和火星之间的战争。而第谷空间站首领Johnson欲借此机会与地球和火星平起平坐。但是...神秘的生物已经脱离了控制...