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A person's X-seam is a measurement related to the person's height. It is measured from a sitting position, and is the distance from the lower back to the soles of the feet. X-seam measurements are used for sizing bicycles and ultralight aircraft. ==External links== * (X-Seam Measurement ) * (X-Seam Illustration ) 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「X-seam」の詳細全文を読む スポンサード リンク
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