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However, in the actual use process, Rules are often defined through "tables" as operators. The reason why iptables are introduced according to the above process is that it is easier to understand them from the perspective of "checkpoints" and from the perspective of entry. However, in order to understand them more smoothly in actual use, we also list the relationship between each "table" and "chain" here.终于升入高中的青春女孩赤羽由宇（小松菜奈 饰），决定一改初中时唯唯诺诺的状态，要好好在高中校园里谈一场恋爱。可是刚入学家中就出现变故，父母因工作的变动，导致她不得不住到学校的宿舍中来。担任舍长的“白王子”白河拓海（千叶雄大 饰）英俊潇洒，温柔体贴，而副舍长黑崎晴人（中岛健人 饰）则是不苟言笑、阴沉无比的“黑恶魔”。由宇饱受抖S黑崎的折磨，苦不堪言。这期间，她突然迎来了和白王子约会的良机。又过了不久，她有被黑崎带去参加他的初中同学会。在那里，由宇见到了黑崎曾经的女友铃音（夏帆 饰）。有趣的故事相继上演……A low temperature stop valve, Unlike Example 1, Comprises a valve body 1 and a valve cover 2, A valve stem 3 is arrange in that valve body 1, One end of the valve stem 3 is provided with a valve disc 4, The other end of the valve stem 3 is provided with an adjusting handwheel 5, A low portion of that disc 4 is provided with a guide sleeve 6, The guide sleeve 6 is fixed by means of a connecting piece and a spring pad 8, Between that disc 4 and the guide sleeve 6 is provide a valve seat 7, Between that valve stem 3 and the valve cov 2 there is provided a packing assembly 9, The O-ring 10 is further arranged at the upper part of the packing assembly 9, the upper part of the O-ring 10 is provided with a packing gland 11, the valve body 1 is provided with an arc-shaped end face 12, the arc-shaped end face 12 forms a line seal between the valve body 1 and the valve seat 7, the contact end of the valve disc 4 and the valve seat 7 is provided with a water grain surface 41, the packing assembly 9 comprises a flexible graphite packing layer, and the valve body 1 is provided with a liquid inlet cavity and a liquid outlet cavity.(2) Issuing false and inaccurate documents;于士鸿率领的西村队在蹴鞠竞赛中夺魁，若云走到士鸿面前表示祝贺。这一幕让铁川看了心里觉得不是滋味。士鸿母亲看到士鸿若云两人拉着手，呵斥成何体统。秉丰胡乱编个借口，若云得以逃脱。铁川为救若云，烧伤胳膊。士鸿和若云互诉衷肠，若云表示看出来士鸿母亲不喜欢自己。性向是流动的第一季……