短语词组短语ball -grinder 磨球机bearing ball grinder [机]轴承球磨床Ball Screw Shaft Grinder 滚珠丝杠磨床Horizontal ball grinder 卧式球磨机ball mill ball grinder 球磨机tiltable ball grinder 倾翻式球磨机surface modification with ball grinder 球磨法表面改性 返回 ball grinder