Four pionts Angle contact ball bearing is separable bearing, it can be subject to bi-directional load and have the function of both single row and double rows bearings.

四点接触球轴承为可分离型轴承，可承受双向轴向载荷，并有单列和双列角接触球轴承的功能。

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As the core parts for high speed spindle, the dynamic properties of Angle contact ball bearing has important effect on cutting performance and machining precision of whole machine.

角接触球轴承作为高速主轴的核心部件，其动力学特性对整机的切削性能和加工精度有重要的影响。

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The influences of many contact parameters such as initial normal force, contact angle, contact stiffness and coefficient of friction were obtained.

获得了凸肩接触面初始正压力、接触角度、接触刚度、摩擦系数等多种参数对叶片非线性响应的影响规律。

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It was revealed that the radius and contact angle of the legs mainly accounted for the large supporting force, ensuring that the robotic water strider not only stood but also walked on the water surface.

FORBES: A Robot That Walks On Water

While it might look like a series of misses, the Navy claims this is just a trick of the camera angle, with all six missiles apparently making contact.

ENGADGET: US Navy tests first 11-meter missile-firing sea drone (video)