Pob ntsia hlau, belongs rau ib qho ntawm cov kev faib tawm ntawm cov cuab yeej siv lub tshuab bearings, yog ib qho zoo tshaj plaws tshuab cuab yeej bearing khoom uas muaj peev xwm hloov rotary motion rau hauv txoj kab khiav.Ball ntsia hlau muaj cov ntsia hlau, txiv ntseej, rov qab ntaus ntawv thiab pob, thiab nws muaj cov yam ntxwv ntawm siab. precision, reversibility ib ...
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