单词	adamantine drill
释义	adamantine drill noun : a tubular well-drilling bit with hardened steel shot that revolve under the rim of the rotating tube Word History First Known Use circa 1904, in the meaning defined above
随便看	chordatest chorded Chordeiles chordeileses chordeilesses chording chordites chorditides chorditises chorditisses chordo- chordoid chordomesoblast chordomesoblastic chordomesoderms Chordonia chordophone chordophones chordophonic chordoplasm chordospartia chordospartiums chordotonal chords chordwise

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