Section 38 Trade Subdivisions 0
| 389 | Metrology |
| 389.1 | Weights and measures Metric system |
| 389.6 (см. также 658.516) | Standardization Normalization |
| 389 | Metrology |
| 389.1 | Weights and measures Metric system |
| 389.6 (см. также 658.516) | Standardization Normalization |
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