英语词汇“room and pillar mining”的意思、用法、释义、翻译、读音、例句、短语、词组-英汉翻译词典

单词	room and pillar mining
释义	room and pillar mining 房柱式采煤法
随便看	protoxidizing protoxids protoxin protoxins protoxite protoxoid Protoxyl protoxylar lacuna protoxylem protoxylem cavity protoxylem lacuna protoxylem pole protoxylems protoxylem strand protoxylem vessel Proto-Yeniseian Proto-Yeniseians protoyonogenin protoyping protoyuccoside protozan protozingiberensisaponin protozoa protozoacidal protozoacide

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