瓷輪:用于漆包線或絲線適量導(dǎo)向,瓷圈由精密陶瓷制作,瓷圈的表面光潔度達(dá)Ra 0.2，轉(zhuǎn)動(dòng)時(shí)跳動(dòng)小于0.15，材料選用99%的AL2O3，硬度HRa 88，密度3.85。

Ceramic weel:ceramic weel used for enamel insulated wire or silk thread appropriate amount guiding, the china circle makes from precise ceramics, the surface smoothness that the china marks with a circle reaches Ra 0.2, moves up and down when rotating being smaller than 0.15 , material selects and uses 99%'s AL2O3 , hardness HRa 88, density 3.85.