Blood vessels in the head tighten to stop the loss of body heat and then relax to let blood flow rise; that sudden rush of blood is what causes the headache.
头部的血管收紧以阻止身体热量的流失，然后放松让血液流动起来，血液的突然涌入是引起头痛的原因。
The full round port area provides maximum flow capacity and minimum head loss.
完全的圆形流道截面能够提供最大的流量和最小的流压损失。
When submersible pumps for wells have qualified efficiency, the high head and flow of impellers will generate reactive power loss.
在效率合格的情况下，井用潜水泵的叶轮扬程和流量偏高时会产生无功损耗。
The flow regime, sediment deposition and the loss of head of two head tanks of the sewage pumping station with different dimensions are studied by using a hydraulic model test method.
采用水力模拟的方法对两个不同结构尺寸的污水泵站高位井的水流流态、泥沙淤积及水头损失等进行了模型试验。
The basic equations describing unsteady flow in lock manifold are derived, in which various hydraulic loss and inertia head of culvert and ports are included.
在考虑了阀门井水流、各水头损失及廊道和支孔惯性长度的影响之后，推导了船闸廊道复合管非稳定流的基本方程组。
There are four emphases in -research, for instance, flow state in pipeline, distribution of concentration and velocity, deposition-limit velocity and calculation of flow resistance or head loss.
研究重点主要集中在管内流动状态、浓度和速度分布、临界流速及阻力损失计算四个方面。
When the flow ratio of diffluent and conflux increases, the head loss I...
分流情况下的水头损失比汇流情况下的水头损失要大。
All Stenner metering pumps have a 3-point roller design in the pump head, which ACTS as a check valve to prevent back flow, siphoning, overdosing and loss of prime.
泵头有3点滚筒设计，设备可作为止回阀阻止回流，虹吸，过量用药和避免大量的材料损失等。
This paper presents the experimental results of the flow characteristics and head loss coefficients of gooseneck section in lock filling and emptying systems.
本文提出了船闸输水系统鹅颈管段的水流特性及阻力系数的试验结果。
Head loss through all EPDfilters will vary dependent upon filter media and how flow rate on start-up.
通过所有EPD过滤器的压头损失将随着过滤介质不同，流量不同而不同。
In this paper, the head loss before and after modification were quantitatively calculated, and the view that in the large flow pipe system, the head loss must designed as possible as lower.
本文对改造前后的阻损进行了定量计算，指出了大流量系统中管路设计应尽可能降低阻损。
In this paper, the head loss before and after modification were quantitatively calculated, and the view that in the large flow pipe system, the head...
本文对改造前后的阻损进行了定量计算，指出了大流量系统中管路设计应尽可能降低阻损。
In this paper, the head loss before and after modification were quantitatively calculated, and the view that in the large flow pipe system, the head...
本文对改造前后的阻损进行了定量计算，指出了大流量系统中管路设计应尽可能降低阻损。
应用推荐