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The emphases and difficulty of the article is the design of three dimensional screw impeller owned by screw centrifugal pump.

本文的设计重点和难点是螺旋离心泵特有的是三维螺旋叶轮的设计。

Screw pump features: the loss of small screw pump, good economic performance.

螺杆泵特点为：螺杆泵损失小，经济性能好。

The sludge residence time in the screw press and thus the filtration time can be adjusted to individual requirements by adjusting the rotational speed of the screw shaft.

污泥停留在螺旋压力机的时间，过滤的时间可以根据实际情况通过改变螺杆轴转的速调整。

Screw out the screw plug of the oil pump, and insert a piece of iron wire into it to

6.5 应经常检查液压油，将油泵螺塞旋出，插入一段铁丝，抽出后看油的深度如果不够，就

Screw out the oil plug while filling, and screw down as finished.

注油时，将油塞旋下，注油毕，再将油塞旋上拧紧。

4 Of the nominal size DN ≥ 200 of the valve, the valve cover can be processed in a screw, after trial, must be plugged with metal plug screw.

4.3.4对公称尺寸DN≥200的闸阀，可在阀盖上加工出一个螺孔，试验完毕后，必须用金属螺塞堵塞。

An integrated unit of ball screw stripping,ball bearing tapered wedge and fixed-distance pull off was adopted in the design of injection mould for screw plug.

在螺塞注射模具设计中，采用了滚珠丝杠脱模装置和滚珠、斜楔拉模、定距联合装置，利用滚珠、螺母、丝杠及齿轮传动自动拧出螺纹塑件，实现塑件自动脱模；利用滚珠、斜楔、滑块机构拉开定模板和浇口板并控制其拉开距离，从而达到自动生产目的。

Lean the plug to the lowest position while changing oil and screw out, then drain the oil refuse in box, fill new oil after box repositioned, and screw down the plug again.

放油油塞即侧面油塞，注油时旋下，见有油渣出时旋上并拧紧，换油时，将此油塞倾斜至最低位置，旋下，放尽箱内废油，箱体复位后注入新油，再旋上拧紧。

Objective: To investigate the effects of the number of the screw in the dynamic compression plates on the stability of plate and screw structure in vitro.

目的：探讨螺钉数量对骨与钢板螺钉结构系统稳定性的影响，为临床上钢板螺钉内固定应用提供实验数据。

Objective: To investigate the effects of the position of the screw in the dynamic compression plates on the stability of plate and screw structure in vitro.

目的：探讨螺钉位置对骨与钢板螺钉结构系统稳定性的影响，为临床上钢板螺钉内固定应用提供实验依据。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。