旋转主轴 meaning in Chinese

kingbolt
live spindle

Methods of test for petroleum and its products - bitumen and bituminous binders - determination of viscosity of bitumen using a rotating spindle apparatus
石油及其产品的试验方法.沥青和沥青粘结剂.用旋转主轴装置测定沥青粘度
Z test conditions for machining centres - part 2 : geometric tests for machines with vertical spindle or universal heads with vertical primary rotary axis vertical z - axis
多工位数控加工中心的试验条件.第2部分:带垂直主轴或带垂直旋转主轴通用头的机器的几何尺寸试验