Grinding Wheels/Window Blinds/Compost/Milk

Series 4 - Episode 5 Grinding Wheels/Window Blinds/Compost/Milk

Thursday 6am - 6:30am Discovery Channel
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Thursday, 6am - 6:30am Discovery Channel HD
Thursday, 7am - 7:30am Discovery Channel +1
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Summary

The processes involved in producing grinding wheels, window blinds, compost and milk, and the ways in which manufacturing techniques have changed.
Science