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单词 in cap
释义

> as lemmas

in (the) cap
c. Mining. in (the) cap: see quots.
ΘΚΠ
the world > the earth > minerals > mineral deposits > features of stratum or vein > [adjective] > pinched
in (the) capa1884
1871 R. W. Raymond Mines of Pacific States 313 The ‘cap’, a term usually employed to express the impoverished condition of the vein, may be due either to the pinching together of the walls of the fissure, or..to the filling of the vein with barren rock.]
a1884 E. H. Knight Pract. Dict. Mech. Suppl. 162/2 A vein is ‘in the cap’ when it is much contracted.
1889 P. Milford Dict. Mining Terms (ed. 2) 14 A mine when the vein matter is barren or when the vein is pinched, or contracted, is said to be ‘in cap’.
c1931 G. F. Willison Here they dug Gold vii. 122 Most of the hard-rock mines are in cap.
extracted from capn.1
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