“\"Bottom-sealed welded joint\"?
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What is a \"bottom-sealed welded joint\"? That friend knows, thank you! !
“A joint formed by placing one piece’s end against the prepared bottom edge of another piece is called a locked-bottom joint. The purpose of this approach is the same as that of using shims, namely to ensure that the root of the weld is fully penetrated; it is used in the welding of pipes with a certain diameter”
A welded extension of a weldment that also serves as a gasket.