Ballut巴吕balln.球；球状物；炮弹；舞会；愉快的经历；<口>胆量；胡说；（复）睾丸v.使成球状；呈球状；<俚>性交ballscrew nut fitting滚珠丝杆螺母副Balls's sledge sorterball grinding machine钢球磨床ball bearing shielded带防尘盖球轴承ball bearing retainer球轴承保持架ball-frame carriage滚珠支座ball-rubbing-type磨球式ball socketed bearing耳轴轴承ball-bearing center滚珠轴承中心ball end milling tool球头铣刀