Pipeline radiography : data sheet I-600-79, revised 1979

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      <subfield code="a">Regular inspection of pipeline field welds by radiography began in the late 1940s. Acceptance of this non-destructive testing was virtually industry wide by the early 1950s. The purpose of this data sheet is to examine the special hazards encountered in radiography, and examine the methods used to control them</subfield>
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      <subfield code="g">Vol. 120, nº 5, November 1979 ; p. 67-70</subfield>
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