... axle to grinding disc,smoothly working ,sovle hte conmventional grinding mill 's problem of exchanging for axletree,bearing bush,and ... high wear-resistant ceramic ball and grinding disk)6)the superfine powder grinding mill takes the reansmission calssify,cylone feeder,four ... to make gradeing and semicolon7)the superfine powder grinding mill takes low rotate speed,negative pressure colling system to ...