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Latest comment: 9 years ago1 comment1 person in discussion
Google hits for "PHA" "preliminary hazard analysis" are four to five times as numerous as for "PHA" "process hazard analysis" both in the web and in books, and there is no significant difference in the methods described under both topics. --Rainald62 (talk) 15:49, 29 October 2014 (UTC)Reply
