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calibration certificate | |||
certificate | |||
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calibration certificate |
检定证: 13 phrases in 10 subjects |
Agriculture | 2 |
Aviation | 1 |
Economy | 2 |
International trade | 1 |
Name of organization | 2 |
Nautical | 1 |
Oil / petroleum | 1 |
Plastics | 1 |
Selective breeding | 1 |
Technology | 1 |