单词	roller chain
释义	roller chain noun : a block chain in which hollow transverse blocks or cylinders turning on steel pins act as rollers to lessen friction Word History First Known Use 1841, in the meaning defined above
随便看	delfs delft delfts delftware delftwares Delgado, Cape Delhi Delhi belly Delhi boil delhies delhis deli Delia delian Delian problem delians delibate delibation deliberant deliberate deliberated deliberately deliberateness deliberatenesses deliberates

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