1.Application of Vertical Parallel Close Bunch Hole Caving Technology in Hujiayu Copper Mine
垂直平行密集束状孔落矿工艺在胡家峪铜矿的应用
2.Stamens 4, anterior 2 longer, ascending to underside of upper corolla lip, parallel, close together;
雄蕊4,前面长,对下面的上面花冠唇来说上升,平行,相近;