| 单词 | etching pit |
| 释义 | > as lemmasetching pit etching pit n. = etch pit n. at etch v.2 Compounds. ΚΠ 1925 Jrnl. Iron & Steel Inst. 111 588 Deep etching with picric or nitric acid fails to develop etching pits. 1935 A. Sauveur Metallogr. Iron & Steel (ed. 4) ii. 17 The figures thus outlined, in reality small cavities, are often called ‘etching pits’ or ‘etching figures’. < as lemmas |
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