single pass welding 单道焊 ; 单道焊接 ; 单焊道
multi-pass welding 多道焊 ; 多层焊
one-pass welding 单道焊
multi-layer and multi-pass welding 分层多道焊
Multiple pass welding 多道焊接 ; 压道焊接
This welding process, with continuous welding wire feeding, fast deposit speed and quality welding pass, is especially suitable for long distance pipeline with large diameter and thick wall.
全位置自动焊接技术的特点是，焊丝可以连续送进，焊丝熔敷速度快，焊接质量较高，尤其适用于大口径、厚壁管的焊接。
The effects of tempering weld-pass treatment on toughness of HAZ of X80 pipeline steel were studied by the technique of welding thermal simulation and the method of microscope analysis.
采用焊接热模拟技术和显微分析方法，研究了回火焊道热处理对X80级管线钢焊接热影响区韧性的影响规律。
To adopt Computer and database technology is to realize effective pass of efficiency control of welder technical file in welding enterprise.
采用计算机和数据库技术是焊接企业实现焊工技术档案高效管理的有效途径。
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