ratching
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ratching — noun ( s) Etymology: from gerund of ratch (III) : extra draft due to excess speed of the mule carriage over the roller delivery in spinning … Useful english dictionary
Bicycle brake systems — are used to slow down, or brake a bicycle. There have been various types through history, and several are still in use today.HistoryEarly bicycles such as the high wheeled penny farthing bikes were fitted with spoon brakes. As they were fixed… … Wikipedia
