目的探讨兔耳大神经端侧吻合后轴突再生的来源，及供神经外膜开窗与否对轴突再生的影响。
Objective to study the origin of the regenerated axons in the recipient nerve and the effect of opening windows on the epineurium of donor nerve.
变型拖拉机受生产使用条件及结构设计等因素的影响，载荷分配一般是前轴载荷偏大，同步附着系数小，在制动状态下易出现后轮先抱死而发生后轴侧滑，制动性能降低。
With the limit of the use condition and structure of derivate tractor, its front load distribution is more than that of the rear and synchronism adhesion coefficient is small.
某带行星齿轮减速器的发电机组在满负荷额定转速工况下，出现减速器轴承及发电机后轴承处横向振动偏大的故障现象。
Under the condition of rated load and rated speed operation of a generator set, over-vibration phenomena appeared in the planetary gearbox's bearing and the rear bearing of the generator.
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