针对鞍钢某厂轧机主减速机承载能力严重不足的问题，提出了三种改进方案。
Three improving methods to solve the deficiency in the bearing capacity of main retarded machines of one plant is put forward.
通过对主减速机齿轮寿命不足问题的分析，提出了在高速级采用组合式硬齿面齿轮的设计方案。
Through analyzing the problem of short life of gears in the main gearbox, the design programme for composite hard-surface gears in high-speed level is described.
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