沟的

The experiment individually focused on the velocity distribution of concentration ellipse shape represented in oxidation ditches existed in sewage treatment plants, and confirmed the rationality of aeration and the submersed flow driver power designed.

该试验在实际污水处理厂进行，对采用同心椭圆型沟道的Orbal氧化沟的流速分布进行了的测定，重点研究了Orbal氧化沟的水力流态特征，验证了曝气及水下推动设备功率配置的合理性。

The survey for similar Orbal oxidation ditch was performed on-the-spot for safety of engineering design. The experiment individually focused on the velocity distribution of concentration ellipse shape represented in oxidation ditches existed in sewage treatment plants, and confirmed the rationality of aeration and the submersed flow driver power designed.

该试验在实际污水处理厂进行，对采用同心椭圆型沟道的Orbal氧化沟的流速分布进行了的测定，重点研究了Orbal氧化沟的水力流态特征，验证了曝气及水下推动设备功率配置的合理性。

Through test, it is considered that it is economic and feasible to adopt vertical auger trenching for some small size channels. After improved and perfected, the newly developed auger cable trencher can adapt to the work conditions of trenching and presents some promotion and application prospect.

通过试验，认为对于小型沟形采用立式螺旋挖沟方式是经济可行的，研制的螺旋电缆挖沟机在改进完善之后，能够适应挖沟的工作条件，具有一定的推广应用前景。

The process of Orbal oxidation ditch and the situation of the dissolved oxygen control of the Orbal oxi- dation ditch in Changling General Works of Petroleum and Petrochemicals were introduced.

介绍了奥伯尔氧化沟流程及长岭炼油化工总厂奥帕尔氧化沟的溶解氧控制现状，分析了影响溶解氧控制的相关因素，并针对该厂奥伯尔氧化沟的施工、设计原因造成的曝气设备充氧能力降低及各沟充氧能力不匹配等问题进行了讨论，同时对存在的问题提出了改进意见。

The fractal values of the gully's alcoves have close relation to the orientations of gullies and the poleward facing gullies have higher fractal values than those of equatorward facing gullies.

冲沟沟头的分维值大小分布与冲沟的方位关系密切，面向极地的冲沟分维值较大，面向赤道的冲沟分维值较小。

Results The tristar of groove was consisted of beak of the ethmoidal bulla and its prolonging process, apex of the uncinate process and anterior peak of the middle turbinate, at the region of frontal recess. The structures called meatal groove, uncinate groove and bullar groove were observed around the ethmoidal bulla and the tristar of groove located at their origination. Under endoscopic view these structures looked like a triangular clefts, so it was named.

结果 星状裂是由筛泡的顶端及其向上伸出的角、钩突的顶端、中鼻甲的前顶端在额隐窝区域汇合形成的一个星状裂隙，上述结构围绕筛泡形成鼻道沟、钩突沟、筛泡沟，星状裂为三条沟的起始部。

From high resolution RS image of study area, gully head locations and land use information can be extracted, by performing overlay analysis on gully head locations map and flow accumulation map, slope gradient map, the slope and upslope drainage area of each gully head can be obtained.

采用的方法是RS技术与GIS技术相结合的方法，利用高分辨率卫星影像提取研究区内所有切沟的沟头位置和土地利用状况，将沟头位置与研究区的水流汇流网络图、坡度图作叠加分析，得到切沟沟头的坡度和上游汇水面积。

However, from the view of the structure and shape of the Orbal oxidation ditch, the round or ellipse tri-ditch type may be difficult to plane layout for the engineering with narrow land locations; the independent sedimentation tank occupies relatively large area of land; central island counts some areas which enlarges inefficient land demand; and the backflow of sludge and nitrified water from the sedimentation tank relies on dynamic system, which increase the cost of construction and operation.

但就奥贝尔氧化沟的工艺构型来看，三沟道的圆形或椭圆形沟型对于狭长的工程选址地来说，平面布置相对困难；而且奥贝尔氧化沟需要独立的二沉池，占地较大；中心岛消耗一定的面积，增加了无效占地；另外，二沉池的污泥回流依靠动力回流，增加了基建和运行费用。

On the base of studying the forming mechanism of spire ditches in deep-hole boring process, this paper analyses theoretically the effect of the boring bar diameter on the oscillation and spire ditches and established the mechanical model.

在研究深孔镗削螺旋沟产生机理的基础上，对深孔镗削加工过程中镗杆直径对振动及螺旋沟的影响进行了理论分析及力学建模，并通过试验研究了增大镗杆直径对减小振动和抑制螺旋沟的积极作用。

Analyzed on dynamics and kinematics about rotary ditching machine , it is feasible and advanced on practice test.

通过对前置上切削旋转开沟机具运动学、动力学的分析和计算，以及对前置上切削旋转开沟功耗的分析，解决了小功率管理机挖深沟的问题；通过试验和生产考核，证明了该套机具可行性与先进性。

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。