| 单词 | founder's sand |
| 释义 | > as lemmasfounder's sand C1. founder's dust, founder's sand (see quots.). ΚΠ 1858 P. L. Simmonds Dict. Trade Products Founders' Dust, charcoal powder, and coal and coke dust ground fine and sifted for casting purposes in foundries. 1858 P. L. Simmonds Dict. Trade Products Founders' sand, a species of sand obtained from Lewisham, Kent, and other districts, for making foundry moulds. < as lemmas |
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