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・ Rotary Wing Society of India
・ Rotary Wing Test Squadron
・ Rotary woofer
・ Rotary Youth Exchange
・ Rotary Youth Leadership Awards
・ Rotaryus
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・ Rotastruma
・ Rotate (song)
・ Rotated electrode voltammetry
・ RotateRight Zoom
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・ Rotating biological contactor
・ Rotating black hole
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Rotating bookmark
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・ Rotating Cell Biofilm Reactor (RCBR)
・ Rotating Detonation Engine
・ Rotating disk electrode
・ Rotating disk viscometer
・ Rotating ellipsoidal variable
・ Rotating furnace
・ Rotating gas-check
・ Rotating line camera
・ Rotating locomotion in living systems
・ Rotating Machine Company
・ Rotating magnetic field
・ Rotating pocket heater
・ Rotating radio transient


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Rotating bookmark : ウィキペディア英語版
Rotating bookmark

Rotating bookmarks were a special kind of bookmark used in medieval Europe. They were attached to a string, along which a marker could be slid up and down to mark a precise level on the page. Attached to the marker was a rotating disk that could indicate the column (usually numbered one to four, indicating the two columns on the left-hand page, and the two columns on the right-hand page).
About 30 such rotating bookmarks have been recorded in libraries in continental Europe, and another half a dozen in England.
==References==

*J. Destrez, ''L’outillage des copistes du XIIIe et du XIVe siècles'', in ''Aus der Geisteswelt des Mittelalters'', Martin Grabmann festschrift, 1935, 19–34
*R. Emms, ''Medieval Rotating Column-Indicators'', Transactions of the Cambridge Bibliographical Society, XII, 2001, 179–l-84).

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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