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English thesaurus
Purification Factor
meteorol., abbr.	PF

Purification: 56 phrases in 14 subjects

Astronautics	3
Aviation	1
Chemistry	1
Clerical	3
Construction	2
Environment	13
General	1
Information security and data protection	1
Information technology	2
Metallurgy	1
Microelectronics	2
Military	21
Oil and gas	3
Technology	2