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corrugation    
n. 起皱,成皱,皱状

起皱,成皱,皱状

corrugation
n 1: a ridge on a corrugated surface
2: the act of shaping into parallel ridges and grooves

Corrugation \Cor`ru*ga"tion\ (k?r`r?-g?"sh?n), n. [Cf. F.
corrugation.]
The act corrugating; contraction into wrinkles or alternate
ridges and grooves.
[1913 Webster]


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