| 单词 | siderography |
| 释义 | siderography —siderographer, n. —siderographic /sid'euhr euh graf"ik/, adj. /sid'euh rog"reuh fee/, n. 1. the art or technique of engraving on steel. 2. a method of increasing the number of reproductions obtained from a steel engraving by first rolling a soft-steel cylinder over a hardened steel plate and then rolling the hardened cylinder over a soft-steel plate. [1810-20; SIDERO-1 + -GRAPHY] |
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