Improvement on the elevatory dragline of zy240 type dump truck 240型自卸车举升拉筋的改制
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Is skull internal pressure excuse me elevatory what reason to have ? is the symptom what kind of 请问颅内压升高都有什么原因？症状是怎样的？
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In this paper , to meet the trend of new elevatory stage , a hydraulic motor driven leading screw elevatory stages were developed 本论文针对当今升降舞台发展的趋势和要求，设计开发了采用液压马达驱动的丝杠升降舞台。
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Main reason is : the first , avian flu virus is more sensitive to temperature , as environmental temperature elevatory , virus surviving time shortens 主要原因是：第一，禽流感病毒对温度比较敏感，随着环境温度的升高，病毒存活时间缩短。
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Have again , fat person have high cholesterol mostly hematic disease and tall insulin hematic disease , after the cholesterol inside body is elevatory , the cholesterol content of the cellular film such as cell of lymphocyte , huge bite is elevatory , controlled immune function 再有，肥胖者大都有高胆固醇血症和高胰岛素血症，体内胆固醇升高后，淋巴细胞、巨噬细胞等细胞膜的胆固醇含量升高，抑制了免疫功能。
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But in recent years , the rate of colonic cancer sicken of townsman is elevatory very fast , this is main with the food of people tall fat changes the tendency to concern , especially " 3 tall one low " ( namely high adipose , high quantity of heat , high protein and low cellulose ) be caused by , eating oil kind food is more , the possibility that come on is larger 可近年来，城市居民的结肠癌患病率升高很快，这主要和人们的饮食高脂化倾向有关，非凡是“三高一低” （即高脂肪、高热量、高蛋白和低纤维素）所致，吃的油脂类食物越多，发病的可能性越大。
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This design absorbed the goods of traditional electric driven screw elevatory stages . lt followed the mechanical - electrical - hydraulic combined idea to analyze the key technic of the total mechanism . the history facts of elevatory stage were discussed . features of various stages were compared ; the developing trends of it and the utilization of hydraulic driving system were discussed 文中介绍了升降舞台的历史与现状，详细分析和比较了升降舞台的各种传动方式及其优缺点，探讨了升降舞台的发展方向与趋势，阐述了机电液一体化技术在舞台机械领域的应用前景，以及采用液压传动驱动升降舞台的可行性与实用性。
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