reduction box减速箱reductionn.减少；降低；减价；(化学)还原反应；(数学)约分reduction process for nitric acid还原法制硝酸reduction by pulling and kneading拔伸捏正Reduction of fracture of vertebra脊椎骨折复位术reduction chamber cut-off valve减压室截断阀reduction of cross-section area截面缩小Reduction amount of contamination污染物削减量reduction of titanium concentrate钛精矿还原reduction of state-owned shares减持国有股Reduction of volvulus of intestine肠扭转复位术Reduction of closed iliac fracture闭合性髂骨骨折复位术