The valve is an impeding part with larger pressure head loss and a lot of discharge energy consumed.
风量调节阀系阻性部件，存在较大的压头损失，须消耗大量送风能量。
The injection mould design of pressure head is introduced, and the points of design are also elaborated.
对押头注塑模设计的实例介绍，详细阐述了其中的设计要点。
Now the pressure head of the pump is not able to make precise calculations in theory, the general use of experimental methods.
目前对泵的压头尚不能从理论上作出精确的计算，一般用实验方法测定。
The actual flow reciprocating pump flow rate than theory, and with the increased pressure head decreases, which is due to leakage caused.
往复泵的实际流量比理论流量小，且随着压头的增高而减小，这是因为漏失所致。
The equations are solved by finite difference method and the mean and variance of pressure head are determined from its random expression.
通过摄动方法得到一系列关于水头展开式的偏微分方程，用有限差分法进行求解，获得了压力水头的随机描述，并计算其均值和方差。
It is considered that the main cause of subsidence at No. 9 measuring point in Heze urban district is due to the variation of deep pressure head.
认为菏泽市城区9号测点下沉的主要原因是受深层承压水头变化的影响。
The grate will be, at intervals, performed according to the settled time or to the automatic control of pressure head between fore and after-grate.
格栅的运行可按设定的时间间隔运行，也可根据格栅前后水位差自动控制。
The nonlinear relation between node pressure head of the pipe network and water capacity and pressure of water supply pump station was deduced by SVM.
利用支持向量机推求管网节点水头和供水泵站供水量、供水压力的非线性关系。
The mathematical model of hydraulic regime of ring-shaped heat-supply network is established, and the pressure head check formula for quota heating is given.
建立了环状管网水力工况的数学模型，给出限额供热的压头校核公式。
If the transport of liquid viscosity and density difference between the larger and water, shall account for the pump parameters: flow, pressure head and shaft power.
若被输送液体的粘度和密度与水相差较大时，应核算泵的特性参数：流量、压头和轴功率。
The characteristics of centrifugal pumps are sent to liquid capacity, the flow evenly, but the resulting pressure head is not high, and the pressure head as the flow changes.
离心泵的特点是，送液能力大，流量均匀，但产生的压头不高，且压头随着流量的改变而变化。
The recuperators have high air resistance , low air preheating temperature and high fan pressure head , and fan has much noise to environment and are apt to break down with vibration .
此换热器空气阻力大，空气预热温度不高，风机压头高，环境噪声大，风机振动大、易损坏。
The variability of the pressure head, velocity and hydrodynamic dispersion coefficient obtained from conditional simulation are smaller than those obtained from unconditional simulation.
条件模拟方法计算出的水头、流速和水动力弥散系数的标准差要小于非条件模拟的结果；
Centrifugal pump characteristic curve on the efficiency of the highest point known as the design point, a pump at the point corresponding to pressure head and flow of work under the most economic.
离心泵特性曲线上的效率最高点称为设计点，泵在该点对应的压头和流量下工作最为经济。
It is suggested to apply the principle of effective gravity and equivalent pressure head to calculate the rotational speed and ingate area in the processing of grinding ball by centrifugal casting.
在离心铸球工艺中，可应用有效重度和等效压头原理计算转速和内浇口断面积。
It is suggested to apply the principle of effective gravity and equivalent pressure head to calculate the rotational speed and ingate area in the processing of grinding ball by centrifugal casting.
在离心铸球工艺中，可应用有效重度和等效压头原理计算转速和内浇口断面积。
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