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_aEngineering product design _c[Engineering Product Design Course Team] _gBlock 4. _hSelf-advancing mine support _bcase study _dprepared by the course team |
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_aMilton Keynes _bOpen University Press _c1984 |
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_a44 p. _bill. _c30cm |
| 518 | 0 | 1 | _aAt head of title: The Open University |
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_aOpen University. _cEngineering Product Design Course Team |
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