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2. Mathematical period: For a function f (x), if there is a non-zero constant T, so that when x takes every value in the domain, there is f (x + T) = f (x), then the function f (x) is called a periodic function. The nonzero constant T is called the period of this function.但是另一部小说，就不一样了。"Er... I really can't remember the model, it's green, probably so thick." Wang Zeduan could not remember the specific model of the explosive cylinder, Just said the color and gesticulated the approximate size with his hand, Later, I looked up the information and learned that The detonators used at position 142 were all Type 68 detonators, This is also a classic explosive barrel widely used throughout the Sino-Vietnamese border war. This type of explosive cylinder is 60 centimeters long each, As long as there is a need, it can be spliced indefinitely. The charge for each section is 2.2 kg, According to Wang Zeduan's description, At that time, the explosive barrel was made up of three sections. Then the total charge is as high as 6.6 kg, However, the high explosive bomb used in the type 66 152 mm howitzer, The charge is 6 kg, In other words, The charge of these three explosive cylinders is 0.6 kg higher than that of a 152 mm grenade. This is also basically in line with his description that it is more powerful than a shell. In addition, after being inserted into the ground, the two sections of the upper half form a certain blast height from the ground, In this way, the explosive power can be better exerted virtually to cover a wider area, so it is indeed reasonable that an explosive barrel can successfully achieve the tactical purpose of successfully clearing position 142 for the second time (the first clearance is 66-type directional anti-infantry mines and 72-type pressure/tripping anti-infantry mines).《神捕十三娘》，国产古装连电视续剧。共36集，由刘蓓，何美钿，何冰，邢岷山，陈宝国，江珊主演。讲述明朝万历天启年间，倭寇作乱，宦官专权，百姓涂炭。江湖上出现一位“女神捕十三娘”，她率领一彪人马抓巨盗，惩大奸，侦疑案，平冤狱，破获了一起起扑朔迷离的惊天大案，演绎了一曲曲可歌可泣的人间传奇。黎章急速跨进了帐篷，她则将马胡乱拴在一截木桩上，接着也跟了进去。清道光年间，杭州城内“信和钱庄”的伙计胡雪岩在中秋节前夕来找“徐疯子”要账，不料，走投无路的“徐疯子”自杀身亡，胡雪岩同情孤寡一生的“徐疯子”，料理他的后事，反被人误传是他逼死了“徐疯子”漕帮首领七姑娘曾经受恩于“徐疯子”，闻听此讯欲为“徐疯子”报仇，将胡雪岩抓到，要把他扔入湖中，船家女罗四见到，叫人将胡雪岩救下，并向七姑娘说明实情，七姑娘后悔自己的行为，向胡雪岩赔礼并代“徐疯子”还了“信和钱庄”的五百两银子……　　送别的机场，可欣尽量平静的和范裔风告别，两个人相互交换项链，也许这便是将两个人注定分离的开始。