词汇“台阶式采煤法 bench mining method; stepping;”的意思、用法、释义、翻译、读音、例句、短语、词组-国际大辞典

单词	台阶式采煤法 bench mining method; stepping;
释义	见:台阶式: 台阶式采煤法 bench mining method; stepping;
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