Terms containing sequence of mining

Subject	English	Chinese
expl.	mining sequence of level	阶段开采顺序同一井田内各阶段的开采次序。阶段开采顺序分下行式和上行式两种。下行式是先采上阶段，由上往下逐阶段回采。上行式则相反
mining.	sequence of mining	开采程序