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English: A Crémaillère is a French, mechanical term for the rack, or a straight bar with teeth on one edge designed to work into the teeth of a wheel or a pinion (French pignon) that predates the Renaissance. The term was generally applied in English to engineering applications which had notched, toothed or drilled surface, even when only visually so, such as the edge of the staircase. The term is also applied to the rack railway.
Français : Une crémaillère est une tige ou une barre (souvent métallique) garnie de crans ou de dents.

rack and pinion 
machine element
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