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143

Centuries: 1st century - 2nd century - 3rd century

Decades: 90s - 100s - 110s - 120s - 130s - 140s - 150s - 160s - 170s - 180s - 190s - 200s

Years: 138 139 140 141 142 143 144 145 146 147 148

Events:

Births:

Deaths:

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Dynabee

... when the axis starts "rolling" inside the groove. (Compare with graphic below.) Since this friction force is essential for the device's operation, the groove must not ...