单词	Bourdon spring
释义	Bourdon spring noun Bour·​don spring ˈbu̇rˌdōⁿ- : a Bourdon tube coiled into a flat spiral spring Word History Etymology after Eugène Bourdon
随便看	betterments bettermost betters Betterton betties betting betting (on) betting machine betting on betting shop bettings bettong bettonga Bettongia bettongiae bettongias bettongs bettor bettors Betts' process Betty Betty lamp Betulaceae betulaceaes betulaceous

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