vertical down welding 向下立焊 ; 立向下焊
electrode for vertical down welding 向下立焊条 ; 下行焊条
electrode of vertical down welding 立向下焊条
vertical down welding technology 下向焊工艺
ertical down welding 向下立焊
ectrode for vertical down welding 向下立焊条
down-hand welding 俯焊 ; 平焊
Down hand welding 水平焊接 ; 俯焊 ; 下游灰化机
The down welding process is applied extensively in long petroleum pipeline construction.
下向焊工艺已经广泛用于长输管道建设工程中。
The project position of welder qualification test for long transporting pipe depends on vertical down welding basically, which is namely fixed pipe with axis horizontal welding (5gx).
长输管道的焊工考试项目位置基本以向下焊为主，即水平固定全位置焊(5gx)。
Welding CCT diagrams of steels are the basic to select welding material, determine the optimum welding technology, relieve welding cracks and lay down standard of past heat treatment.
钢的焊接CCT图，是正确选择焊接材料、确定最佳焊接工艺、消除焊接裂纹、制订焊后热处理规范的重要依据。
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