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6. Understand that communication between modulesOne problem with the factory method pattern is that the creation of the class depends on the factory class, that is to say, if you want to expand the program, you must modify the factory class, which violates the closure principle. Therefore, from the design point of view, there are certain problems, how to solve them? We use the abstract factory mode to create multiple factory classes, so that once new functions need to be added, we can directly add new factory classes without modifying the previous code. Because the abstract factory is not very easy to understand, let's look at the diagram first, and then it is easier to understand with the code.　　与搭档犬鹫·伊斯卡达尔一起，为了粉碎席卷国家之间的阴谋与策略而行动的玛法姆特，刘铜锣，是与方杠子、戴慧平同年同月同日生的黄安（红军时期改县名红安）三兄弟。在一起念私塾、斗军阀的少年时代义结金兰，成为生死兄弟。长大后，参加了黄麻起义的刘铜锣、方杠子逐渐成长为骁勇善战的红军年轻将领，而戴慧平则成为备受器重的国民党青年军官。在鄂豫皖苏区“围剿”与反围剿的斗争中，三兄弟战场上是对手，私底下却依然是兄弟。方蕾、曹丽君则作为三兄弟青梅竹马的伙伴，在共同的革命历程中结下了可歌可泣的友情加爱情。(2) When operating on the water surface, the WIG ship shall be used as a motor ship and comply with the provisions of this chapter.结果从大货船船舱之中出来的竟然是两千条马匹，他们都惊诧不已，不由得游戏诶呆住了。刘宇文是一个读书之人，所以他很鄙视那些没文化没见识的人，看到小说中，林平之外公一家人竟然把《笑傲江湖》曲谱当作《辟邪剑谱》，顿时发出冷冷的嘲笑。