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After the matching relationship between inlet valve and piston trajectory was analyzed, a dual crank shaft mechanism was designed, and method of adjusting the valves between their on-off time and continuance time was obtained.

分析了进气阀与活塞运动之间新的匹配关系。设计了复曲轴连杆结构，并得到调节进排气门的开关时刻与持续时间的方法。

GFRPPS ; vehicle engine ; water pump paddle wheel ; water inlet coupling plate

增韧增强聚苯硫醚；车辆发动机；水泵叶轮；进水接盘

The steady suck of the pool inlet hole is lapping at me and I'm grinding my skinny white ass around on that feeling.

入水口在节奏稳定的吮吸着我，而我把白白瘦瘦的屁股压下去享受这种感觉。

The steady suck of the pool inlet hole is lapping at me and I'm grinding my skinny white ass around on that feeling.

这个泳池进水孔一直吸着，我还把自己瘦瘦白白的屁股在那周围蹭来蹭去。

Moreover, the cavitatig flow in poppet valve were simulated for different inlet velocity and different outlet area, respectively.

而且对锥阀在不同进口速度和不同出口面积的流场分别进行了模拟。

The effects of inlet velocity, outlet pressure, opening size as well as cone angle on cavitation intensity in the water hydraulic poppet valve were numerically investigated.

分析了进口流速，出口压力，阀口开度和阀芯锥角对纯水液压锥阀阀口气穴强度的影响。

Furthermore, The effects of inlet velocity, outlet pressure, opening size as well as cone angle on cavitation intensity in the poppet valve, ball valve and water hydraulic poppet valve were numerically investigated.

进一步分析了锥阀，球阀和纯水液压锥阀阀口几何参数与边界条件对气穴的影响。

The analysis of the flow fields shows there are two locations,the plackets on the intake cannulation and the inlet of the exit cannulation,where the pressure loss and regenerated noise are likely to bring.

通过分析数值计算结果，找到该款消声器产生压力损失和再生噪声的主要部位分别是消声器进气内插管开孔处和出气内插管的进口处。据此提出了相应的改进方案。

Under the operation and standard condition, the performance of Roots blower in sewage treatment plant is changed with inlet temperature and pressure, aiming at this problem, the method to determine volume flow and outlet pressure of blower are discussed. Combining with thermodynamics and the operation principle of blower, the calculation formula of flow is derived, and the using method of the calculation formula is explained through example of selection and design in actual engineering.

针对污水处理厂罗茨鼓风机在使用状态与标准状态下，进口温度、压力等条件发生变化时，导致风机的性能也发生变化这种情况，探讨了设计选型时，鼓风机容积流量、出口压力等的确定方法，结合工程热力学原理及罗茨鼓风机的工作原理，推导了流量的计算公式，并通过实际工程中选型设计的计算范例，说明了计算公式的使用方法。

Under the operation and standard con2dition , the performance of Root s blower insewage t reatment plant is changed with inlet tem2perature and pressure , aiming at this problem ,he method to determine volume flow and outlet pressure of blower are discussed. Combining with thermodynamics and the operation principle of blower , the calculation formula of flow is de2 rived , and the using method of the calculation formula is explained through example of selection and design in actual engineering.

针对污水处理厂罗茨鼓风机在使用状态与标准状态下，进口温度、压力等条件发生变化时，导致风机的性能也发生变化这种情况，探讨了设计选型时，鼓风机容积流量、出口压力等的确定方法，结合工程热力学原理及罗茨鼓风机的工作原理，推导了流量的计算公式，并通过实际工程中选型设计的计算范例，说明了计算公式的使用方法。

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。