class-B
| stage
| class B abbr. | |
| radio | B-Betrieb |
| stage abbr. | |
| gen. | Bühne; Podium; Schauplatz; Stadium; Stufe; Zwischenstufe |
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| B-Betrieb einer Verstärkerstufe | |||
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class-B : 25 phrases in 10 subjects |
| Communications | 1 |
| Economics | 1 |
| Electronics | 4 |
| General | 1 |
| Materials science | 1 |
| Measuring instruments | 1 |
| Medical | 6 |
| Microsoft | 1 |
| Technology | 8 |
| Transport | 1 |