| 单词 | grain roll |
| 释义 | > as lemmasgrain roll grain roll n. an iron roller made by casting the metal in sand. ΚΠ 1904 F. W. Harbord & J. W. Hall Metall. Steel xvi. 291 Such rolls cost from 50 to 100 per cent. more than those cast in sand, and known as ‘grain rolls’. 1932 E. Gregory Metall. i. 18 Small amounts of chromium also bring about considerable grain refinement, which is desirable in ordinary ‘grain’ rolls used for roughing purposes. < as lemmas |
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