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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.(2) the second mast lamp, after and above the front mast lamp; Ships less than 50m in length are not required to display the mast light, but can do so;他将鱼收拾好，装在砂锅里清洗。贾杰侦探是个经过生化实验的半机器人，他全身上下装有14,000个精巧的机关，办案成绩卓著，一直是城市里最有名的侦探，坏心的克劳博士却要故意陷害贾杰，因此他必须想办法重振自己的声威。************接连几日，朝廷上都在议论处置荣郡王谋反一案，或者说，宁王之子秦霖谋反一案。A1.2 Key Contents of Routine Inspection ItemsContacts need to be sent to the target user.