| |||
master gauge | |||
calibration instrument; master instrument; reference instrument; standard instrument | |||
master meter | |||
standard meter | |||
| |||
reference instrument |
标准仪表: 29 phrases in 7 subjects |
Aviation | 17 |
Electronics | 5 |
General | 1 |
Geophysics | 1 |
Metallurgy | 1 |
Refrigeration | 1 |
Technology | 3 |