BRITISH STANDARDBSEN10253-4尘：2008Butt-welding pipefittings—Part 4:Wrought austenitic andaustenitic-ferritic (duplex)stainlesssteels with specific inspectionrequirements盈ICS23.040.40;77.140.20步S引NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBritish Standards
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