均匀粒状的

In order to enhance wear-resisting performance of the internal combustion engine piston ring,matrix microstructure and radial elastic force of the piston ring,the matching between piston ring and cylinder were analyzed.

为提高内燃机活塞环的耐磨性能，分析了活塞环的基体组织、径向弹力及活塞环与气缸套的匹配状况对其耐磨性的影响。试验表明活塞环的基体组织以细粒状珠光体或回火索氏体、石墨呈细小均匀分布为佳；活塞环的径向弹力大小应适宜，一般为

With temperature increasing, granular outshoot prefer to grow along with vertical direction of surface of BN core, as well as the wrapped leaf-like shape form from granular ones. And the productions always kept complete morphology of sphere, which was due to the uniform growth of fluffy film on the BN core. Wrapped leaf-like structure of BN piece in fluffy film favored increasement of measured surface area and elimination of oxygen element.

凝并在球核表面的中间产物受到初始BN球核在空间上的诱导作用，随着温度的升高，突出物倾向沿着垂直于球面的方向向外生长，形貌由普通的粒状转变为卷叶状；绒膜的厚度均匀一致，产品得以保持规整的球状形貌，绒膜中卷叶状的BN结构利于氧杂元素的脱除，同时增加了比表面积。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。