balance bar平衡杆balancen.平衡；天平；平静；结余；差额；调和；制衡vt.权衡；使平衡；抵消；称重量vi.均衡；建立平衡balanced production line均衡生产线balance of probabilities[法] 可能差额balance of visible trade贸易收支balance sampling circuit平衡取样电路balance calibration test天平校准试验balanced-draft control负压调节balance of inertia force惯性力平衡balance control software全网平衡软件balance of appropriation经费结余balanced photo receivers平衡接收器