补焊
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... patch weld 补焊 patch welding 镶焊 patchboard 插头板，配线板，接线盘 ...
welding patch 焊补工艺
The powder submerged arc welding technique can be applied in welding medium & thick steel plate patch.
对不具备窄间隙埋弧焊机条件下的厚板拼接提供了借鉴。
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