?因具有優異的強度耐熱性耐濕性尺寸穩定性等特點、有助于提高回轉破壞強度及降低片間段差， 進而實現了降低噪音及碳刷磨損等課題。
?同時具(ju)有良好的加工性，開槽(切削(xue)）加工軸壓入點(dian)焊都非常易做。 

?Excellent mechanical strength, heat resistance, humidity resistance and dimensional stability improve revolution at burst and bar-to-bar movement for noise reduction and brush wear.
?Processability such as slitting, press-fitting of shaft and fusing is also excellent.