据HKEPC资料介绍，公版显卡散热风扇采用5cm双滚珠（Two Ball Bearing）风扇，最高速转为5,000rpm、最高风量为7.16CFM、最高声噪为52dB(A)，在闲置情况下转速约1，800rpm，声噪为25dB(A)，全速约在3,50...
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two row ball bearing 双列滚珠轴承
two-direction self-aligning ball thrust bearing 双球面止推滚珠轴承 ; 自调止推滚珠轴承 ; 双曲面止推球轴承
two-row ball bearing 双列球轴承
two shields ball bearing 双保护垫的滚珠轴承
ball bearing with two seals 两面带密封圈的球轴承
If you could give the ball bearing such a high speed, then the two terms are equal.
如果你能让滚珠，有这么高的速度，这两项就会相等。
One-way, two-way pressure ball bearing cage generally use steel stamping molding, large size or special use of the bearings are made of brass or mild steel turning cage.
单向、双向压力球轴承保持架一般采用钢板冲压成型，大尺寸或特殊用处的轴承则采用黄铜或软钢车削保持器。
Two-bearing units have several advantages over the more conventional arrangements where two self-aligning ball bearings or two spherical roller bearings are mounted in separate plummer block housings.
双轴承单元与装在分离式座式轴承中的两个自调心球轴承或两个圆柱滚子轴承的常规配置相比，有若干优点。
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