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- sealing head loss 密封压差
- It takes only two to four irradiations to inspect a sealing head weld by using the technology. 使用这种方法，一般只需两到四次透照就能完成封头焊缝的探伤。
- Chiu and Seman(1971)studied the head loss of flows transporting sediment in circular and square pipes with spiraling motion. 邱和思门（1971）研究了在圆管和方形管中输沙时具有螺旋运动的水流的水头损失问题。
- The critical velocity and the head loss gradient of slurry pipelines are important design parameters. 临界速度和水头损失坡降是浆体输送管道的重要设计参数。
- Flow regime and head loss of two different tailrace systems in hydropower station were investigated. 对两种不同的尾水系统布置方式进行了流态和水头损失的对比分析。
- XM-230/80 rotary seal head is a rotary seal unit on wellhead, specialized for negative pressure and low pressure drilling, characterized by reliable sealing effect, ease of opration and safe service. XM-230/80型钻井旋转密封头是一种专用于负压、低压钻井的井口旋转密封装置,具有密封可靠、操作简单和防爆、安全等优点。
- Unique design features in the 1710 Series give improved flow measurement accuracy as well as a lower head loss characteristic compared to other valves. 与其它结构平衡阀相比,1710系列平衡阀独特的结构,改善了流量测量的精确度,减少了压头损失。
- Unique design features in the 1710 give improved flow measurement accuracy as well as a lower head loss characteristic compared to other valves. 与其它阀门相比，1710独特的结构特征能够改善流量的量测精度，减少压力损失。
- A heat exchanger pipe with continuous helical baffles was proposed.Pressure distribution and head loss of the heat exchanger pipe were calculated. 摘要提出了一种连续螺旋折流板换热管，对其内部流场进行了数值模拟，并进行了物理模型实验验证。
- The conflict of head loss development and effluent quality decline should be fully considered in determining backwashing parameters. 好气滤池的反冲洗应综合考虑反冲洗后滤池出水水质下降和水头损失恢复之间的矛盾。
- By a discussion on K value, the radiographic technology for thebutt welds in standard elliptic sealing heads consistent with current standards and regulations is presented. 围绕K值展开讨论，提出一种符合现行标准、规程要求的标准椭圆封头拼接焊缝的射线探伤工艺。
- Based on the combination of the theoretical analysis and flume experiment, the local head loss associated with pile permeable groins is discussed. 为此，结合理论分析和水槽试验对其局部水头损失进行探讨。
- But water head loss of filter for aluminium sulphate polysilicate application will grow quicker than that for aluminium sulphate . 残留的铝含量降低，而残留硅的含量没有增加，但投加聚硅硫酸铝会导致滤池水头损失增加。
- The water head loss is low. When water flow through 0.9m-thick zeolite, flow rate is 2.6m/h, 4.2 m/h, 7.4 m/h, and the water head loss is 3-5cm,8-12cm,and 15-20cm, respectively. 沸石具有很好的通透性，水流通过0.;9米厚的交换层时，2
- Press a Thick Wall Hemispherical Seal Head 一种厚壁半球形封头的压制
- The course contains hydrostatics, hydrodynamics, head loss and related hydraulics calculation, some special hydraulic problems and measurement of hydraulics factors. 主要讲授水静力学、水动力学基础、水头损失及有关水力计算、若干特殊的水力问题、水力要素的量测。
- Based on an experiment of head loss for long-throated flume, the flaw of water head loss calculating formula which based on the theory of boundary layer is pointed out. 在实验的基础上,指出对用边界层理论计算长喉槽水头损失公式的缺陷,分析了局部水头损失产生的机理,补充了进口侧收缩水头损失的计算,对原公式进行修正提高计量精度
- Cook the meat quickly at first to seal in the juices. 一开始要大火烧肉，以便保存肉汁。
- The putty gives a good seal round the window. 窗户四周泥的油灰密封效果很好。
- She nestled her head on his shoulder. 她将头依偎在他的肩上。
