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roughen ['rʌf(ə)n] v
gen. 使变粗糙; 使不平滑; 凿〔琢〕毛; 弄成崎岖不平
el. 表面拉毛处理; 使粗糙
oil 铲麻面
tech. 琢毛; 变粗糙; 凿毛; 使粗糙

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