Category:Raise boring
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raise is a shaft in a mine which joins two levels by definition mined upwards | |||||
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Media in category "Raise boring"
The following 2 files are in this category, out of 2 total.
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AmCyc Boring - Boring Machine.jpg 711 × 891; 175 KB
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Raised bore.jpg 516 × 250; 64 KB