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| Управление по безопасности и охране труда в добывающей промышленности (The Mine Safety and Health Administration Ivan Leontev) | |||
| Angielski tezaurus | |||
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| Mine Safety and Health Administration | |||
| Michigan Speech-Language-Hearing Association; Mine Safety And Health Administration | |||
| US Mine Safety and Health Administration | |||
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MSHA : 2 do fraz, 2 tematyki |
| Karta charakterystyki materiału | 1 |
| Sachalin | 1 |