ORIGINAL SENTENCE: Catgut, the tough thread used for tennis-racket strings and surgical sutures, isn't never made from out of ca
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To prevent warping, thin, organic bonded wheels such as those used for cutting-off should be laid flat on a horizontal surface of steel or similar rigid material away from excessive heat and moisture.22 To minimise deterioration, wheels must be stored in a room which is dry and not subject to extreme temperatures.