单词	plane angle
释义	plane angle noun : an angle that for a given dihedral angle is formed by two intersecting lines each of which lies on a face of the dihedral angle and is perpendicular to the edge of the face Word History First Known Use 1570, in the meaning defined above
随便看	needing needle needle and thread needle beam needle bearing needle beer needle blight needle board needle bug needle cast needle chatter needle dam needle file needle fir needle furze needle grama needle gun needle ice needle iron ore needle ironstone needle juniper needle lace needle loom needle ore needle palm

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