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.
柱轴承一般只用于承受径向负荷,与套圈道为线性接触,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.
压实作业的重要机械就是振动压路机,振动压路机的压实的优越性使其占压路机市场的90%的份额。
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.