18.In general,the cylindrical roller bearings, belonging to axial discerptible bearing,are suitable only for sustaining radial loads.The contact of roller with race is linear.
圆柱滚子轴承一般只用于承受径向负荷,滚子与套圈滚道为线性接触,属轴向可分离型轴承。
19.The important machinery of the schoolwork soil compaction is the vibroll whose superiority makes it take 90% of the market of road roller.
压实作业重要械就是振动压路,振动压路压实优越性使其占压路市场90%份额。
20.In this paper,a new small-sized bit is introduced.The bit is mainly composed of a biassed polyconic cutter,a cylindric roller and two bit legs.