KGA62,KGF304010,地(di)軌專用(yong)(yong)重(zhong)載滾(gun)輪(lun)導(dao)軌,使(shi)(shi)用(yong)(yong)方型導(dao)軌尺寸40*30*1000,能更好(hao)的(de)符合地(di)軌對(dui)導(dao)軌的(de)使(shi)(shi)用(yong)(yong)要(yao)求。滾(gun)輪(lun)和導(dao)軌的(de)負(fu)載接觸更為緊密。