[机]?焊缝
...期目录、摘要 关键词:HFW石油套管;焊缝;冲击韧性;原材料;焊接条件;热处理 [gap=452]Key Words:HFW casing;welded seam;impacting toughness;raw material;welding procedure;thermal treatment ...
?熔接缝
... thin seam薄煤层 welded seam焊缝;熔接缝 seam welding[化]缝焊 ...
?熔接链
... 熔接轨条 welded rail 熔接链,锻炼链 welded seam 熔接箱,熔接槽 welded tank ...
对接焊缝 ; 对焊缝
焊缝补强
焊缝裂开
[机]焊缝;熔接缝
welded joint??/??welding line
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