vacuum electron beam welding meaning in Chinese

真空电子束焊

Development of local vacuum electron beam welding machine for flange circumferential weld
法兰环缝局部真空电子束焊机的研制
Non - vacuum electron beam welding equipment has been produced in foreign country , but it is expensive . national technology of vacuum electron beam welding is mature , but there is no research on track planning and process planning for electron beam welding
非真空电子束焊接设备在国外已经面世,但价格昂贵;国内真空电子束焊接技术比较成熟,但对大型铝合金产品焊接研究尚少,有关电子束焊装过程的轨迹规划与工艺规划研究尚属空白。