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64974.html
64974.html
https://www.iso.org/standard/64974.html
ISO 80000-3:2019 Quantities and units — Part 3: Space and time
P856
Q90137277-5333878d-42c1-e10d-744c-91b8e78fd22a
P856
64974.html
https://www.iso.org/standard/64974.html