单词	backing hammer
释义	backing hammer noun : a hammer with a broad claw at one end of the head and a flat head at the other end used in shaping the backbones of books Word History First Known Use 1818, in the meaning defined above
随便看	mercantilists mercapt- mercaptan mercaptans mercaptides mercapto- mercaptobenzothiazole mercaptole mercaptopurine mercaptopurines Mercator Mercator chart Mercator projection mercatorial mercats Merced Mercedarian mercedarii mercedarioes mercedarios Brugge brugh brughs brugmansiae brugmansias

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