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单词 npl
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NPL
NPL n. British National Physical Laboratory.
ΚΠ
a1912 W. T. Rogers Dict. Abbrev. (1913) 137/1 N.P.L., National Physical Laboratory (Bushey, by Teddington).
1920 Flight 12 1131/2 With regard to the staffs at the N.P.L. and at the R.A.E., he said he hoped that provision would be made to maintain these on an adequate scale.
1953 K. J. Hume & G. H. Sharp Pract. Metrol. (1965) ii. xx. 94 Screw Pitch Measuring Machine of N.P.L. 6 in. × 9 in. type, or similar machine of proprietary make.
1998 New Scientist 18 July 21/3 NIST's version of NPL's ‘watt-balance’ device comprises an electromagnet nearly three metres tall with a scale on top.
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