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Endothermic theory: When the flame retardant is heated, endothermic reactions occur, such as decomposition, melting, sublimation, phase change, etc., which make the fiber dissipate heat rapidly and fail to reach the combustion temperature.Skin patterns are designed to resolve dependencies between classes and class homes, Like spring, the relationship between classes can be configured into the configuration file, while the appearance mode is to put their relationship in a Facade class, which reduces the coupling degree between classes. There is no interface involved in this mode. Look at the following class diagram: (Let's take the startup process of a computer as an example)Article 55 These Provisions shall not apply to the maintenance of building fire fighting facilities within the warranty period by the construction unit.只是这自古孝道为大，该先救老娘。身怀异禀的护士阳子（長谷川京子饰），只要握住对方的手，便能看到对方的生命力。阳子为了拯救病人，经常偷偷地将自己的命力传给对方，帮助对方康复……看得众人一齐发笑练霓裳心灰意冷地走了。