board and pillar

同义词释义

1)board and pillar,房柱式开法2)board and pillar work,房柱式开法3)bord and pillar work,房柱式开法4)room and pillar,房柱5)room-pillar method,房柱法6)room and pillar,房柱式7)room-pillar rate,房柱比8)room and pillar method,房柱法9)room and pillar system,房柱法10)mining by pillar-and-room method,房柱法开采