Mine ventilation shaft topped with a device to extract the stale air from the mine. H is a vane to make the barrel revolve so that is always facing in the optimum wind direction. From De re metallica, by Agricola, pseudonym of Georg Bauer (Basle, 1556). Woodcut.
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Details
Creative#:
TOP09159515
Source:
達志影像
Authorization Type:
RM
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須由TPG 完整授權
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NO
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NO
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No
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