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servavahemikuga põkkõmblus, millel on U-tähe kuju (vt põkkõmblus), a groove weld/butt weld in which the joint edge of both members is prepared in the form of a J from one side, giving a final U form to the completed weld (see: groove weld/butt weld)
U-õmblus . Materjalitehnika terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//mtr/U-%C3%B5mblus/1/est (03.07.2026)