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Why the sailor in a submarine was able to see the image of the enemy's vessel more clearly during the day than at night? The view through a submarine's periscope was ...Get price
The Hierapolis sawmill, a Roman water-powered stone saw mill at Hierapolis, Asia Minor (modern-day Turkey) dating to the second half of the 3rd century AD is the ...Get price
A watermill or water mill is a mill that uses moving water as its power source. It is thus a structure that uses a water wheel or water turbine to drive a mechanical ...Get price
The invention of the rolling mill is attributed from Leonardo da Vinci Earliest rolling mills were slitting mills, which were introduced from what is now Belgium to ...Get price
A windmill is a mill that converts the energy of wind into rotational energy by means of vanes called sails or blades. Centuries ago, windmills usually were used to ...Get price