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| infra-sons | |||
| infra-son; infrason m | |||
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| infrason m | |||
| Angielski tezaurus | |||
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| Very low-frequency sound which can travel long distances and easily penetrate most buildings and vehicles | |||
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infrasound : 1 do fraz, 1 tematyki |
| Organizacja narodów zjednoczonych | 1 |