英语词汇“packing expander”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-新都网

单词	packing expander
释义	> as lemmas packing expander † packing expander n. Obsolete ΚΠ 1865 Sci. Amer. 9 Dec. 379/1 Forging apparatus... Annular packing expanders applied to one or both ends of the cylinder. a1884 E. H. Knight Pract. Dict. Mech. Suppl. 652/1 Packing expander, a spring to spread the packing of a piston or valve against the surface upon which it traverses. extracted from packingn.¹ < as lemmas
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