精准用平码算特肖公式规律
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Double row angular contact ball bearings, which are suitable for working conditions, require low noise, small torque, high temperature resistance and light weight, but also require good sealing performance, while bearing radial load, but also bear axial load.                 

Double row angular contact ball bearing is a kind of high precision bearing. The sealing groove needs grinding to improve sealing performance and reduce torque.


精准用平码算特肖公式规律
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