room-and-pillar caving房柱: pillars of a house; upright式: type; style崩落开采法: caving房式崩落开采法: panel working with caving-system崩落开采法: caving method; caving system下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:房柱式崩落开采法,即可在微信中查询翻译