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1755As shown in FIGS. 1-3, a low temperature stop valve comprises a valve body 1 and a valve cover 2, wherein a valve stem 3 is arranged in the valve body 1, a valve disc 4 is arranged at one end of the valve stem 3, an adjusting handwheel 5 is arranged at the other end of the valve stem 3, a guide sleeve 6 is arranged at the lower part of the valve disc 4, the guide sleeve 6 is fixed by a connecting piece and a spring pad 8, and a valve seat 7 is arranged between the valve disc 4 and the guide sleeve 6.上世纪三十年代，刚从警校毕业的年轻姑娘吴曼，来到河城警察局，跟着老侦探游子坚实习。有人欺负在街头摆摊的黄毛一家，吴曼深表同情，决心为他们伸张正义。吴曼向游子坚说了自己的想法，但游子坚的不温不火，胆小怕事让吴曼大为不解。吴曼很快查清了迫害黄毛家的人，本来是一件很简单的案件，但却迟迟得不到处理，周围人的态度也使吴曼大为失望。吴曼带着黄毛离开了河城，在去洋城路上，进鱼米香酒店吃饭。吴曼经过讯问老板娘，讯问店里的两个伙计，讯问离开酒店的大仙，破解了一个玄疑之谜，解救了一对苦命的夫妻。吴曼开了一家调查事务所，她和她的同事们在与黑暗势力的斗争中，开始从更深层次思索人生，逐渐走上了革命的道路。Question: In the last paragraph of the analysis of Case 2, "the law of the consumption process is also obvious. Events with X=0, 3 and 5 will disappear when consumed, and other events that have not been consumed will be directly transmitted to the top parent View instead of being transmitted back layer by layer." Why is this?Learning thinking and learning methods are very important, resulting in three situations of confusion and poor harvest: short contact thought comprehensive, incomplete mastery eager to overthrow, insufficient comprehension and rhetoric, and the most important thing in learning is to keep a large period of time and practice deliberately patiently and modestly.关键就在她身上，只要找到她，就好办了。等明天早上再派人去接来。