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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.张居正微微点头过后，望向徐文长：久闻徐先生大名，请。The previous studies are all related to the consumption of onTouchEvent (). Here, we study the interception of onInterceptTouchEvent () event distribution.A hole specified for precise positioning of printed board production and component assembly.1935年，北平艺专摄影科学生吴大中在学生游行时对投身地下党的高海薇一见钟情，并为了爱情参军投身抗战。1937年7月7日，日军悍然炮轰宛平城，高团长（高海薇父亲）为救吴鸿运而牺牲，满心愧疚的吴鸿运更加坚定了杀鬼子的决心，在共产党北平临工委骨干刘永祥的推荐下，吴鸿运和宋玉泉启程奔赴延安。途中得知八路军在平型关集结抵抗日军，毅然加入，吴鸿运凭借自己的机智，在攻打老爷庙的关键时刻立下战功，八路军最终取得“平型关大捷”。在吴鸿运、宋玉泉、高海薇等北平学生抵达延安后，延安领导命吴鸿运组建摄影队并担任摄影队的队长，宋玉泉担任警卫班的班长。两人先后向高海薇表明心迹，面对两个性格迥异的追求者，高海薇左右为难。为了赢得高海薇芳心，队长与班长间展开了激烈竞争，凡事都得争个高下。随后，吴鸿运和宋玉泉又一起编撰《前线》杂志、参加黄土岭战斗、攻打井陉煤矿、收编黑马队，两个情敌也在一路互相较劲中建立起了别样的战友友谊，一起为抗日战争的胜利做出了突出贡献 。3. There is no need to deal with problems such as off-site expansion and store management in scale.