Tympan

(n.) A drum.

(n.) A panel; a tympanum.

(n.) A frame covered with parchment or cloth, on which the blank sheets are put, in order to be laid on the form to be impressed.

编辑:朗达

• The bed traveled on guide ways, and the tympan and frisket were hinged to fold back and lay in elevated position. Edward W. Byrn. 十九世纪发明进展.

克拉丽斯编辑