短語(yǔ)詞組短語(yǔ)auxiliary blind inclined shaft 副暗斜井blind incline shaft 暗斜井blind d shaft 盲井blind inclined shaft 暗斜井blind shaft winze 暗井vertical blind shaft 盲竪井blind shaft development 盲竪井開(kāi)拓rectangle blind shaft 矩形盲井 返回 blind shaft