ISO 14644 Part 1 and Part 2 have been revised as new, Final Draft International Standard (FDIS): ISO/FDIS 14644-1 (2015),Cleanrooms and controlled environments, Part 1: Classification of air cleanliness by particle concentration, and ISO/FDIS 14644-2 (2015), Cleanrooms and controlled environments, Part 2: Monitoring to provide evidence of cleanroom performance related to air cleanliness by particle concentration.
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