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单词 ntp
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N.T.P.
N.T.P. n. (also n.t.p.) Physics normal temperature and pressure, namely a temperature of 0°C and a pressure of one standard atmosphere (101,325 N m−2, approx. 760 mm of mercury); now usually called s.t.p.
ΚΠ
1899 R. H. Jude & H. Gossin Physics iv. iii. 275 It is usual, in quoting both the specific gravity and the absolute density of a gas, to refer them to normal temperature and pressure (N.T.P.).
1924 A. J. Allmand & H. J. T. Ellingham Princ. Appl. Electrochem. (ed. 2) xxv. 636 279 litres of dry gas at N.T.P.
1955 K. Hutton & A. Swallow Chem. for Gen. Sci. iii. 32 The density of air is 1.29 gms. per litre and that of argon 1.78 gms. per litre, both measured at N.T.P.
1973 J. G. Tweeddale Materials Technol. I. iii. 56 Atoms of elements such as hydrogen or oxygen which, at n.t.p. always form into diatomic molecules.
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