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| planter of paris blocks (for measuring soil wetness); gypsum blocks (for measuring soil wetness); porous blocks (for measuring soil wetness); electrical resistance blocks (for measuring soil wetness) | |||
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| resistor network | |||
| resistor unit | |||
| блоки сопротивления: 4 phrases in 4 subjects |
| Electrical engineering | 1 |
| Shipbuilding | 1 |
| Technology | 1 |
| Telecommunications | 1 |