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product name abba manufacturing china NUE 3 1 2 J55 api steel pipe coupling standard API SPEC 5CT steel Grade H40,J55,K55,N80,L80,C-90,C95,T95,P110,Q125,13Cr-80,1CRL80,3CRL80,9CRL80,13Cr-110,Super 13Cr. Place of Origin Tianjin China tubing coupling size EUE:114.30mm min ...