Mechanical Clock

Mechanical clocks history

Mechanical clocks history

A Japanese clock ( 和時計, wadokei ) is a mechanical clock that has been made to tell traditional Japanese time. Mechanical clocks were introduced…

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History of cesium

History of cesium

Melting Point: 301.59 K (28.44°C or 83.19°F) Boiling Point: 944 K (671°C or 1240°F) Density: 1.93 grams per cubic centimeter Phase at Room Temperature:…

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Rolex precision history

Rolex precision history

The history, icons, and the record-breaking models of the Geneva-based Rolex watch company A lavishly illustrated book for the lovers of watches…

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