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The mechanical pump is a direct drive rotary vane vacuum pump. It is used as a forepump for the diffusion pump, and to rough pump the degasser, the distillation, the distillate and the residue chambers.

机械真空泵直接驱动，为扩散泵预先抽取真空，也为了脱气，蒸馏，残留物收集器和蒸馏物收集器的抽取真空工作。

The stationary ring of the device is fixed on the cover of the pump, the rotating ring and the pump shaft are in the endwise slip connection. The elastic cell acts on the direction for the rotating ring to press the stationary ring, while the pump shaft outside the pump cover is hinged with the flying iron, of which the force transferring end acts in the direction for the rotating ring to deviate from the stationary ring.

本装置的静止环固定在泵盖上，旋转环与泵轴在轴向滑动连接，所配置的弹性元件作用于旋转环的压向静止环方向，泵盖外的泵轴铰接飞铁，飞铁传力端作用于旋转环的脱离静止环方向。

Owing to the fact that construction enterprise realized the usage superiority of long boom truck-mounted concrete pump gradually, at the same time ,owing to a large number of increment for small high-story buildings in city, quantity of truck-mounted pump with boom support length over 42m increases rapidly at commercial concrete market of Shanghai city since it started in the latter half of 2005, pump delivery price of 28 yuans per m3 also propelled fast development of long boom truck-mounted pump samely.

企业包袱沉重、机构人员臃肿、设备实力弱（2 1.5m3和2 1m3搅拌机组）等缺陷使省建混凝土公司在激烈的市场竞争中逐渐处于劣势。省建公司在南京市的工程本身就很少，这也使得混凝土公司全部对外经营，享受不到任何大树底下好乘凉的美妙感觉。

This removal of air from the pump casing produces a partial vacuum on the pump inlet ,here the fluid is trapped between the teeth of the upper and lower gears and the pump casing .continued rotation of the gears forces the fluid out of the pump discharge .

这种泵内空气运动使泵吸入口处形成了真空，于是外部油箱的液体在大气压的作用下，由泵的入口进入，聚集在上下齿轮和泵壳体之间，齿轮连续的旋转使液体流出泵的出口。

It widely serves as fresh water and seawater cooling pump, burr pump, ballast pump and general pump, and used for seawater desalting device and marine pressure cabinet.

广泛应用于淡水和海水冷却泵、舱底泵、压载泵、消防泵、日常总用泵等。

It widely serves as fresh water and seawater cooling pump, burr pump, ballast pump and general pump, and used for seawater desalting device and marine pressure cabinet.

CSL 系列船用立式中开双吸离心泵是我公司近年开发的新产品，由船用电机驱动，适用于大型船舶作压载泵、消防泵、总用泵及液货输送泵。

In a vacuum system, the pump can be used alone or as a booster pump, diffusion pump, such as the pre-pump.

在真空系统中，这种泵可单独使用，或作为增压泵、扩散泵等的前级泵。

It is the first time to propose pump-control-pump technique that booster pump controls water-flood pump.

首次提出了用增压泵控制串接大功率注水泵的泵控泵(Pump-Control-Pump)技术。

The Service Center is equipped with Active Gauge Controller and Penning gauges and Pirani gauges made by BOC Edwards, Helium leak detector made by Leybold and complete professional tools. Some engineers and technicians received professional training overseas, most of them have experienced vacuum service over ten years for many customers. The serviced types include rotary pump, roots pump, diffusion pump and dry pump, etc.

本维修中心配备有英国比欧西爱德华的真空控制及显示仪和真空规（ AIM 、 APG ）、德国莱宝的氦检漏仪、专业的维修工具，技术队伍中有数人曾经在国外受过专业培训，多数人员拥有十年以上的真空专业维修经验，并已经为众多的客户提供过优质的服务，曾经服务过的真空泵种类有机械旋片泵、罗茨泵、扩散泵、干泵等。

Pump: RCDL / RCDLF standards for the installation of the electrical non-self-priming vertical multi-stage centrifugal pumps, electrical axis through the pump head and shaft connected by coupling, rod bolts to cylinder pressure, over-current components in the pump head and out of fixed paragraph water between the pump inlet-outlet in the same line.

泵： RCDL/RCDLF为安装标准电机的非自吸立式多级离心泵，电机轴通过泵头用联轴器与泵轴联接，拉杆螺栓将耐压筒、过流部件固定在泵头和进出水段之间，泵进出水口在同一直线上。

Objective To study the effect of chitosan in the prevention of fibrous scar formation in the epidural space after laminectomy.

目的 观察选择性脊神经后根切除术椎板切除后硬膜外几种防瘢痕粘连物质的作用并探讨其机制。

On his way to the lift, he looked back to us or was it me his eyes pointing?

当他要进电梯时，他回头看我们（或者说是我，他的眼光？