mechanical device used in printing; holds the copy for the compositor
copyholder详细解释
cop.y.hold.er n.（名词）An assistant who reads manuscript aloud to a proofreader.校对助手：向校对员大声读原稿的助手A device that holds copy in place, especially for a typesetter.原稿架：一种固定稿件的装置，尤指为排字工人设置的
