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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, An O-ring 10 is further dispose at that upper portion of the packing assembly 9, An upper part of that O-ring 10 is provide 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, the valve body 1 is provided with a liquid inlet cavity and a liquid outlet cavity, the two O-rings 10 are concentric arranged, and the inner diameter and outer diameter of the two O-rings are different.清末民初，小镇上天真烂漫的少女曹七巧和京城大户姜家的三少爷季泽一见钟情，可七巧的哥哥曹大年贪图钱财要把妹妹嫁给患有软骨病的老二仲泽，七巧为了接近季泽，答应这门婚事。失望至极的季泽在仲泽的婚宴上喝得酩酊大醉，令七巧心痛欲裂。此后，季泽越来越沉沦，常常夜宿妓院，七巧冒险到妓院劝阻，与酒醉的季泽同居了一晚，并因此怀孕，生下一子，由此招致众人的诸多非议。仲泽为保护妻子，临终时，坚定地声称自己是这孩子的亲生父亲，姜老太太亦为维护自家的名声，痛斥众人对七巧的攻击。老大伯泽夫妇为了倾吞家产，利用七巧对季泽的感情，设下一个个圈套，造成七巧和季泽误会重重，使得她们本来纯洁的情感在金钱和岁月的摧残下渐渐消逝。于是七巧的人格开始扭曲，性情变得冷酷，她甚至亲手毁掉了儿女的婚姻和幸福，变成一个刻薄自私、终日靠鸦片麻痹灵魂的女人。山坡上，蒲俊瞧着沟底的熊熊大火，心道：故技重施不假，先得意着吧，后面有你受的。Reference: Baidu Encyclopedia-Application Double Opening汪正松便询问胡家人，昨晚何人给胡镇送饭等问题。希望韩信不要让自己失望，给自己带回来一个惊喜。