To realize the automatic control of mechanical-transmission system in automobiles, the transmission pattern and process of traditional mechanical-transmission system are analysed.
本文从汽车机械式变速系自动控制角度出发，对传统机械式变速系的换档规律、换档过程以及自动控制模式等进行分析。
Objective To identify the source of influenza a (H1N1) infections, determine the transmission pattern among patients, and summarize the experience derived from the prevention and control work.
目的为明确甲型H1N 1流感病例的感染来源，探索病例间传播方式，总结防控工作的经验及教训。
Objective To identify the source of influenza a (H1N1) infections, determine the transmission pattern among patients, and summarize the experience derived from the prevention and control work.
目的为明确甲型H1N 1流感病例的感染来源，探索病例间传播方式，总结防控工作的经验及教训。
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