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| action of methane on an environment (1) |
| criterion of estimation of ecological risk (1) |
| decontamination mining holes (1) |
| eko-safety of coal mines (1) |
| imitation modeling (1) |
| maintenance of methane in coal layers (1) |
| methane-apportionment of coal mines (1) |
| technological measures (1) |
| troop landings of methane in an atmosphere (1) |
| викиди метану в атмосферу (1) |