We usually use vacuum tubes such as the first generation of computer computer.
而我们通常把这种使用真空管的计算机称为第一代计算机。
2
The mechanism of welding crack generation in the copper - stainless steel tube electrode stem of Vacuum Consumable Arc Furnace has been analyzed.
分析了真空白耗电弧炉铜-不锈钢异种金属套管式电极杆焊接裂纹产生的机理。
3
This thesis discusses the singularity and the horizon of a static electromagnetic vacuum solution generated from Schwarzchild outside solution, on the basis of the theorem generation solution.