mandreln.
英 'mændr(ə)l | 美 'mændrəl
中文n. （圆形）心轴
词根词源
mandrel (n.)"miner\\'s pick," 1510s, of unknown origin; perhaps borrowed from French mandrin, itself of unknown origin. Also applied from 17c. to parts of a lathe or a circular saw.
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