多道焊接 meaning in Chinese

multipass welding
multiple pass welding
multirun welding

The other way , theoretical analysis of weld tracking system with a leading sensor is stated , based on the analyzing of movement process of the tracking system , a loop control structure diagram is presented , the deuce vision feedback system is used and realized the repeated and automatic tracking in multiplayer seam and controlling of system of tracking and system of motion
同时就传感器超前检测式焊缝自动跟踪系统进行了深入的理论分析，在分析该系统跟踪过程运动关系的基础上，建立了系统的闭环控制关系图，并提出了其系统数学离散控制结构简化图。采用两点式视觉伺服反馈系统，实现机器人在多层多道焊接时的重复自动跟踪以及跟踪机构的控制和焊炬横向调节机构的控制，并使之协调联动，满足焊接过程的要求。