Crushing gold bearing ores in mills similar in principle to flour mills. Bottom left goats in treadmill: horizontal power transferred to mill, A, through crown-and-pinion. Bottom right men turn capstan and power transferred through tooth-and-pinion. From Agricola De re metallica Basle 1556. Woodcut.
px | px | dpi | = | cm | x | cm | = | MB |
Details
Creative#:
TOP15881598
Source:
達志影像
Authorization Type:
RM
Release Information:
須由TPG 完整授權
Model Release:
No
Property Release:
No
Right to Privacy:
No
Same folder images: