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| back fill | |||
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| earth backing (в котлован) | |||
| засыпка грунта: 30 phrases in 12 subjects |
| Agrochemistry | 1 |
| Architecture | 2 |
| Construction | 7 |
| Makarov | 1 |
| Metallurgy | 1 |
| Military | 8 |
| Rail transport | 2 |
| Road works | 2 |
| Sakhalin | 2 |
| Seismology | 1 |
| Technology | 2 |
| Weapons of mass destruction | 1 |