Single-direction and double-direction angular contact thrust ball bearings (Figures 1.50 and 1.51) are used for machine tool spindles requiring rigid axial guidance.
单向和双向推力角接触球轴承（图1.50和1.51）都用机床主轴轴向刚性作为指导。
Air propeller is the tool which transforms the power of aerial engine to the thrust of aircraft.
空气螺旋桨是把航空发动机的动力转化为飞行器推进力的工具。
Double-direction Thrust Bearing used in machine tool spindle.
双向推力轴承在机床主轴使用。
Double-direction Thrust Bearing used in machine tool spindle.
双向推力轴承在机床主轴使用。
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