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单词 pan system
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pan system
pan system n. now rare
ΚΠ
1870 Overland Monthly Sept. 217/2 The miner carefully washes it [sc. loose quicksilver].., picking out with his fingers the iron pyrites and other débris—a process which is the only vestige we have of the old pan system.
1918 in E. L. D. Seymour Farm Knowl. I. xli. 454 Four cows and a separator are therefore equal for buttermaking purposes to 5 cows of the same quality and the shallow pan system.
1937 Gold Coast Colony: Blue Bk. 1936 144 (table) System of Sewerage. Pan system.
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更新时间:2024/11/10 22:53:29