机械挡块，扭轴同步，精度高。
Mechanical stop and steel torsion bar to maintain synchronization and high precision.
对纺织机械用无级变速扭轴断裂原因进行了失效分析。
In this paper, tbe reasons for the fracture of an infinitely variable speed twist shaft which is used in spining wheel are analyzed.
指出， 氧化脱碳引起疲劳寿命降低是该扭轴失效的主要原因。
The primary reason for lowering the fatigUe life is decarburization.
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