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JIS B 9920-1 PDF
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Cleanrooms and associated controlled environments — Part 1: Classification of air cleanliness by particle concentration
standard by Japanese Industrial Standard / Japanese Standards Association, 01/01/2019
JIS B 9920-1 – Cleanrooms and associated controlled environments — Part 1: Classification of air cleanliness by particle concentration
JIS B 9920-1:2019 specifies the classification of air cleanliness in terms of concentration of airborne particles in cleanrooms and clean zones, and separative devices as defined in JIS B 9917-7.
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