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231

Centuries: 2nd century - 3rd century - 4th century

Decades: 180s 190s 200s 210s 220s - 230s - 240s 250s 260s 270s 280s

Years: 226 227 228 229 230 - 231 - 232 233 234 235 236

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Dynabee

... the lower rim of the groove. While the axis is slipping around inside the groove, the friction between the axis and the groove rims will accelerate or brake the ...