Specification for approval testing of welders working to approved welding procedures.  Part 1.  Fusion welding of steel / 
British Standards Institution 
 - 9 leaves :  illustrations ;  31 cm. 
 - British standard ;  BS 4871 : Part 1 : 1982 .
 - British standard ;  BS 4871 : Part 1 : 1982 .
<br/><br/><label>ISBN: </label>0580128504 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Non-destructive testing.<br/>Stainless steel.<br/>Defects.