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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.As for us, through a shortcut of knowledge, just a few days of experiences came to teach us these facts, that multiple species of plants can be used as dyes and that plants carry most of the pigments. However, most of these pigments are fragile and break down easy over time, or once the fabric is washed. Only pigments that well resist oxidation make up valuable dyes.The real essence of this book is the above. However, in order to deny "talent determinism", the author cited a lot of papers and practical examples, resulting in some "tedious". Before proposing what it is and how to do it, the author made a demonstration and quoted extensively.Components and wiring should be evenly distributed on the PCB as far as possible to avoid being too concentrated in a certain part of the PCB, especially DIP devices, which is not allowed.瑶儿，你带小凡先走。Two implementations:5. Except as referred to in paragraph 7 of this Article, a towed boat or towed object shall show: