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| Military Sketching Board ： ウィキペディア英語版 |
Military Sketching Board
The Military Sketching Board was designed to be used on horseback. The board incorporates a compass, an inclinometer, a ruler, a roll of paper and an arm buckle.
==Description==
The board was designed to be strapped to the arm of a cavalryman on the arm that he held the horses bridle with. The board is attached to the leather buckle with a swivel joint. This means that the user can twist the whole board on their arm to ensure that the compass alignment is clear.〔 The board incorporates a compass for this purpose. The user can then use the supplied ruler. In earlier versions this was attached with rubber bands but later versions had the ruler permanently attached. The paper was about two or three feet long and was rolled around one of the side rollers. As a sketch was completed then the paper roll was advanced to supply more clear paper. On the back of the board is an Inclinometer to allow the severity of ascents to be recorded.〔
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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