The jacket is made via the first and only one laser welder in china imported from german by we lehui group . lehui group invest large quantities of capital to introduce this laser welding system with the most advanced technology of fabricating fermentation tank 乐惠公司斥巨资引进的激光焊机系统是世界上最好的发酵罐制造技术，目前在欧洲和美国、日本等国家已经有85 %以上的发酵罐采用激光焊接技术。
