- plastic pulley
- 2016-10-24 23:52
- Thehybridceramicbearinghassteelinnerandouterringswithceramicballs,asforthefullceramicbearing;theinner,outerringsandtheba
- Valve ball
- 2016-10-23 14:25
- Comparedwithsteelball,ZrO2ballhasfollowingadvantages:1.23%lighterthansteelball,whichmeanslesscentrifugalforceandlessfric