英语词汇layer of ballast是什么意思，layer of ballast的用法、释义、翻译、读音、例句、短语词组-英汉汉英翻译词典-觉斋网

单词	layer of ballast
释义	DEFINITIVE EXAMPLES 权威例句〔roadbed〕A layer of ballast directly under the ties.道碴：直接铺在枕木下的石碴美国传统
随便看	limit of credit limit of debate limit of detection limit of detenion limit of elasticity limit of error limit of fatigue limit of financial capacity limit of flammability limit of flocculation limit of floculation limit of free delivery limit of friction limit of heat limit of impurities limit of inaccuracy limit of integration limit of integration limit of liability limit of overdrawn account limit of perception limit of proportionality limit of resolution limit of rollability limit of saturation

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