英语词汇“vein mining”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

> as lemmas

vein mining

vein mining n.

ΚΠ

1830 C. Fisher Let. 22 Mar. in Assay Offices N. Carolina & Georgia 13 in U.S. Congress. Serial Set (21st Congr., 2nd Session: House of Representatives Rep. 82) I Cabarras county, which had hitherto only been considered as productive in its washings, was ascertained to be a vein mining district.

1874 J. H. Collins Princ. Metal Mining (1875) viii. 47 In vein mining trial borings are not often made.

2000 F. Cardarelli Materials Handbk. iii. 198 Gold is obtained by two principal mining methods: (i) placer and (ii) vein mining, and also (iii) as a by-product of the mining of other metals.

extracted from veinn.

as lemmas

单词	vein mining
释义	> as lemmas vein mining vein mining n. ΚΠ 1830 C. Fisher Let. 22 Mar. in Assay Offices N. Carolina & Georgia 13 in U.S. Congress. Serial Set (21st Congr., 2nd Session: House of Representatives Rep. 82) I Cabarras county, which had hitherto only been considered as productive in its washings, was ascertained to be a vein mining district. 1874 J. H. Collins Princ. Metal Mining (1875) viii. 47 In vein mining trial borings are not often made. 2000 F. Cardarelli Materials Handbk. iii. 198 Gold is obtained by two principal mining methods: (i) placer and (ii) vein mining, and also (iii) as a by-product of the mining of other metals. extracted from veinn. < as lemmas
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