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2004
2003
No. 34 |
1 kg mass standard in platinum-iridium, No. "A" |
NPL, United Kingdom |
2001
Study Notes
2003
No. 1 |
1 kg mass standard in platinum-iridium, No. 651 |
NPL, United Kingdom |
2001
No. 1 |
1 kg mass standard in platinum-iridium, No. 651 |
NPL, United Kingdom |
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