| 单词 | platinum steel |
| 释义 | > as lemmasplatinum steel platinum steel n. ΚΠ 1852 N. Amer. Rev. Oct. 372 The only effect was, to give currency for a time to ‘silver steel,’ and ‘platinum steel’, which the manufacturers have since found to be mere follies. 1875 E. H. Knight Pract. Dict. Mech. Platinum-steel, steel alloyed with 1/ 110 part of platinum. It is said not to be quite so hard as silver steel, but tougher. 1973 Notes & Rec. Royal Soc. 27 295 Hadfield comments..after examining Faraday's platinum steels, ‘Platinum at any rate in amounts up to about 2.5 per cent is therefore soluble in either low or high carbon steel.’ < as lemmas |
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