英语词汇“secondary haulage”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	secondary haulage
释义	secondary haulage secondary haulage [′sek·ən‚der·ē ′hȯl·ij] (mining engineering) That portion of the haulage system which collects coal from gathering-haulage delivery points and delivers it to the main portion of the system.
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