循环器

We use the long packing element packer to plug the casing bore, in order to control the water intake of high peameabili-ty zone and improve the water intake of low permeability zone.

针对喇嘛甸油田葡Ⅰ1-2厚油层渗透率级差大，注入水无效循环现象严重的特性，提出了采用长胶筒封隔器封堵套管炮眼控制高渗透层吸水量的方法，从而提高低渗透层的吸水能力。

The rationality of industry cooling water system using stainless steel tube condenser in power plant is analyzed from technique, economy and security aspects.

从技术、济和安全三个方面分析了采用不锈钢管材凝汽器的火力发电厂的工业冷却水系统，采用闭式循环工艺运行方式的合理性。

A centrifugal water pump circulates coolant through the water jackets, passages, intake manifold, radiator core, cooling system hoses and heater corThe pump is driven from the engine crankshaft by a drive belt on all engines.

离心水泵通过水套、出入口、进气歧管、散热器芯子、冷却系统软管和加热器芯子使冷却剂循环。水泵由引擎皮带通过引擎曲轴驱动。

This system mainly contains six parts , that is solar collector, thermal storage tank, radiator, hot water distribution system, pumps and control systems.

该系统主要由太阳能集热器、蓄热水箱、房间散热设备、生活热水输配系统、管道循环泵以及控制系统组成。

This paper introduces the problems in double backpressure condenser vacuum system by taking certain power plant as example,especially the circulating water with high temperature has influence on the economic efficiency of unit,put forward countermeasures to solve these problems.

以某电厂为例，介绍了双背压凝汽器真空系统存在的问题，特别是循环水水温较高时会影响机组的经济效率，并提出了解决该问题的对施。

The neural network models for steam turbine power output and power needed in cycle cooling water system are established for the reference values of vacuum value of condenser and have a high precision and reliability.

建立汽轮机发电功率和循环水系统功耗神经网络模型以确定不同工况下凝汽器真空运行最优值，实现对二者的模拟预测，有很高的精度和可靠性。

Monitoring the efficiency of thermal cycle is quite difficult because some of the parameters are not amenable for measuring, especially the variation of the efficiency caused by the worsening of the vacuum of the condenser.

汪健热力循环经济性能指标的在线监测由于受到某些不可测参数的限制而不易实现，尤其是凝汽器真空变化所引起的指标变化很难实现在线监测。

With the established model and the data of power needed in cycle cooling water system, the best vacuum value of condenser can be determined, and energy loss result by deviation of some main operation parameter can also be determined, compared with conventional models , the model established by us has the advantage of pertinence to the actual equipment since the sample data were collected from the operating equipment.

利用该模型和循环水系统功耗模型可确定不同工况下的真空运行最优值，为凝汽器真空运行最优值的确定提供了一个全新的方法，同时利用该模型计算几个主参数偏离基准值的能损偏差，同传统的运行参数基准值模型和能损偏差分析方法相比，该模型具有明确的设备针对性。

Circulating current through a resonant tank circuit and inverter switches is reduced by feeding high frequency current back through a line inductor.

通过经过一个线路电感线圈将高频电流反馈，可以降低经过一个谐振储能电路和变换器开关的循环电流。

Economics is studied on steam injector substituting the tube-shell heat exchanger and the circulating pump in the heating system of the thermal power plant.

针对热电厂供热系统采用升压加热装置改造热网加热器和循环水泵的可行性和经济性开展了研究。

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。