老化砂的英文

• antiquated sand

• 老化:    age; ageing; burn-in; prebur ...
• 砂:    sand; grit
• 活化砂:    activation sand; activity sandsidy
• 碳化砂:    carbonized sand; carbosand
• 老化:    age; ageing; burn-in; preburning; maturing 干部老化 the aging of cadres; 设备老化 the aging of equipment; 知识老化 the aging of knowledge; 老化试验 aging test; 老化稳定性 aging stability; 老化系数 aging coefficient; 老化现象 ageing phenomenon