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Thrust of this mechanism is to limit milk production.
该机制的主旨就是限制牛奶产量。
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Thrust ball bearings can bear radial load, lower speed limit.
推力球轴承不能承受径向负荷，极限转速较低。
youdao
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Thrust ball bearings can bear radial load, lower speed limit.
推力球轴承不能承受径向负荷，极限转速较低。
youdao