The results show that the wear of the roller and scale board includes mainly three coexistent mechanisms: cutting wear, plastic deformation wear and brittle-fracture-peeling wear.

结果表明：显微切削、反复塑变和断裂剥落三种磨损机理并存，其中以反复塑变磨损为主。

After the kibbling in the first hopper, by monolayer partition panel, the material will enter the second hopper, which has plane scale board with steel ball inside to grind material.

物料在第一仓达到粗磨后，经单层隔仓板进入第二仓，该仓内镶有平衬板，内有钢球，将物料进一步研磨。

After rough grinding in the first hopper , by monolayer partition panel, the material will enter the second hopper, which has plane scale board with steel ball inside to grind material.

物料在第一仓达到粗磨后，经单层隔仓板进入第二仓，该仓内镶有平衬板，内有钢球，将物料进一步研磨。

The answers offered by an analysis of the past are more general; they relate to scale and they are actions that we can take on board, though we may not like their message.

分析过去，得到的答案更具普遍性，过去的活动是规模化的，是我们可以考虑借鉴的，尽管我们也许不喜欢那些通讯方式。

Nobody should underestimate the scale of BP’s mistake, nor the damage that it has caused. But if the president does not stand up for due process, he will frighten investors across the board.

BP这次所犯的错误之大和造成的严重影响不能小觑，但是同时，如果奥巴马不按照程序来解决问题的话，他将吓跑来自世界各地的投资者。