1.This can be kind hard to do when the draws are resting on slabby stuff, as the rope is interfered with by the rock.
这在斜板地形较不顺手,因为快扣靠在岩壁,绳子会被岩壁妨碍到;
2.New 730E frother was used in the flotation tests of common oxidized copper ore, oxidized copper ore with high combination rate and carbonaceous slabby rock copper ore of Tangdan Copper Mine.