This is caused by the back surge of water to the pumping equipment.
它是由水流反向压力波冲击管道设备引起的。
LS series wet roots vacuum pump is a rough vacuum pumping equipment.
LS型直排大气湿式罗茨真空泵属粗真空获得设备。
Sand production of an oil well does great harm to the surface and downhole pumping equipment.
油井出砂是石油开采过程中遇到的重要问题之一。
The electricity of coal mine main pumping equipment consuming constilute important statute, its economic operation has important effects to mine production costs.
矿井排水设备消耗的电能占矿井总耗能量的比重很大，其运行经济性对矿井生产成本具有重要影响。
Further improvements in drainage canals and pumping equipment in the older sections of the city were also made. These operated well until they were overwhelmed by Hurricane Katrina in 2005.
城市其他老城区的排水渠道和排水设备有有了进一步的提高，这些设施直到被2005年卡崔娜飓风淹没之前，一直运转良好。
Gas-separation equipment is also used in downhole applications, such as the protection of pumping equipment against gas lock by separating and redirecting free gas at the pump suction or inlet.
气体分离设备也在井下使用，如保护抽油设备使得不会在泵的吸入处或入口处由于游离气的分离和改变方向而发生气锁。
Install, test, maintain and repair water well pumps, piping systems and equipment and perform pumping tests to assess well performance.
安装，测试，维护和修复水井泵，管道系统和设备，并进行抽水试验，评估水井性能。
At the same time equipment can be operated while pumping vacuum.
同时设备可以边运转边抽真空。
If the water rises to about 40 or 50 cm, we will immediately assemble our equipment, and start pumping water from the low-lying parts under the viaduct.
如果水位上升40至50厘米，我们将马上集中我们的设备，开始在高架桥下的低洼地区进行排水。
Used in pumping systems to protect equipment from damaging pressure surges or waves caused by rapid changes of flow within the pipeline.
用在泵系统上，保护设备不会受到由于管线内流量变化而产生的压力波动或起伏的破坏。
Oil pipeline pumping stations may be classified by the function or purpose, by the type equipment used, by the method of operation, or by the material pumped.
输油管道泵站可以其功能或目的、所用设备类型、操作方法、或泵送的油料等进行分类。
This paper mainly introduce and explain level long distance pumping concrete from pump equipment type, concrete mix design, materials selecting and project construction type.
本文主要介绍混凝土水平长距离泵送特点，从泵送设备选型、混凝土配合比设计、原材料选择和工程应用施工要点等加以说明和介绍。
Engineering staff should also turn off power and air-condition equipment of the fire sections. Engineering staff should communicate with the fire Pumping Room to ensure water supply.
关闭火警区域内的有关能源和空调设备，保持与消防泵人员的联系，配合灭火确保供水。
As for the users, attention should be paid to the maintenance of the equipment and the regulation of the balance of pumping units to keep the unit working under good conditions.
对于用户来说，则应加强设备的维护保养，细心调节抽油机的平衡，使其工作在良好的平衡状态下。
Fracturing equipment includes pumping units, blenders, bulk handling equipment such as sand and frac fluid transports, and a manifold trailer, etc.
压裂设备包括泵机组、混砂车、散装运输设备(如砂子和压裂液运送设备)以及管汇拖车等。
Based on the analysis of automatic management and equipment operation of a large sewage pumping station, the design concept for the autocontrol of the pumping station is proposed in this article.
通过对大型污水泵站自动化管理功能及设备运行工艺状况的分析，提出泵站自动化控制技术的设计思想。
This paper mainly focuses on the fluctuation of velocity and torque of the electromotor because of the variational load in the pumping unit equipment.
摘要抽油机中载荷变化大，易引起电动机转速和转矩的波动。
Vortex diodes pump is a new-type maintenance-free equipment with no moving parts for pumping hazardous liquids.
涡流二极管泵输送设备是一种新型的用于高危物料输送的无运动部件的免维修输送系统。
The paper introduces in details the first application of COW-the introduced mechanical cleaning equipment from Nippon-in Dongying initial pumping station.
对引进日本的机械清洗设备COW，在东营首站第一次使用的情况做了较详细的介绍。
Phenomenon: a sudden interruption of pumping system moves, and there is abnormal sound equipment there is a strong vibration, the tunnel is no corresponding vibration.
现象：泵送系统动作突然中断，并且有异常声响，设备有较强振动，但管道内无相应振动。
This equipment was composed of air pumping, mixing, sign detecting and electrical controlling components.
设备主要由气体传输、气体混合、信号检测和电气控制几大部分组成。
Airtight containers in addition to pumping gas one of the basic equipment.
用来抽除密闭容器的气体的基本设备之一。
The system of VPI equipment mainly includes vacuum chamber, heating unit, worktable with its drive unit, vacuum pumping unit, gas-charge unit and control unit, etc.
该设备主要出密封罐、加热系统、升降工作台、真空系统、充气系统、控制系统及密封罐水冷系统等组成。
The paper introduces the yellow project pumping station frequency conversion speeder, and analyses the principle of the frequency modulation and the supplementary equipment performance.
介绍了引黄工程泵站变频调速装置，对其变频调速原理及其配套设备的性能进行了详细分析。
The design principle and primary parameters' computing on the Gas Trap Hood of the equipment pumping cooking oil fumes is introduced in this paper.
详细论述了抽油烟机集气罩的设计原理，以及主要参数的确定方法。
Mechanical and electrical equipment in pumping stations and water treatment works should be regularly maintained to ensure a stable water supply.
抽水站和滤水厂的机械及电机设备，须定期进行保养和维修，确保供水稳定。
Unreasonable selection of pump type and improper combination operation are the main causes of low efficiency and energy consuming of intake pumping station equipment.
取水泵站装置效率低、能耗大的主要原因是水泵选型和组合运行调度不合理。
Is the modern water supply and drainage engineering, pumping station project, sewage treatment plant, water treatment equipment, municipal engineering major suppliers.
是现代给排水工程、泵站工程、污水处理厂、水处理成套设备、市政工程的专业供应商。
Is the modern water supply and drainage engineering, pumping station project, sewage treatment plant, water treatment equipment, municipal engineering major suppliers.
是现代给排水工程、泵站工程、污水处理厂、水处理成套设备、市政工程的专业供应商。
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