horsehead

Construction of Shaft Cap , Raise Shaft and Horsehead Under Special Conditions

特定条件下井帽天井马头门的施工

The Horsehead Nebula : New stars have already formed inside part of it .

马头星云：新的恒星已经在其内部形成了。

Research the Capability of Loading Resistance on Two Horsehead Beam Pumping Units

双驴头抽油机游梁承载能力研究

Welding and machining of connection sleeve of rear horsehead on special type beam pumping units

异型游梁抽油机后驴头连接套的焊接与加工

Calculating method on static horsehead load of water drainage and gas production equipment about beam pump for CBM wells

煤层气井有杆泵排采设备悬点静载荷计算方法

Suggestions on improvement of swing horsehead beam pumping unit . A new type of swing - pod pumping unit

关于旋转驴头抽油机改进设计的建议新型摆杆式游梁抽油机

Horsehead Design of Rotating Horsehead Pumping Unit

旋转驴头抽油机的驴头设计

Explanation : The Horsehead Nebula is one of the most famous nebulae on the sky .

马头星云是天空中最著名的星云之一。

The shape of the rear horsehead outline curve is the key to the design of pumping unit with double horseheads .

后驴头轮廓曲线的形状是双驴头抽油机设计的关键。

In some point , the Horsehead Zither is the symbol of Mongolian tradition music culture , even the entire Mongolian traditional culture .

从某种角度讲，马头琴是蒙古族传统音乐文化，甚至是蒙古族传统文化的象征和标志。

Preliminary study on fisheries biology of yellow Horsehead Branchiostegus argentatus on the fishing ground off northeast Fujian

闽东北外海渔场银方头鱼渔业生物学初步研究

As soon as I had finished eating , Doodle and I hurried off to Horsehead landing .

我一吃完饭，就赶紧和嘟嘟去到豪斯海德码头。

Failure analysis of the crank pin assembly on beam pumping units Welding and machining of connection sleeve of rear horsehead on special type beam pumping units

游梁式抽油机曲柄销联接机构失效分析异型游梁抽油机后驴头连接套的焊接与加工

By variable density method , an optimal topology model is established with the help of the software ANSYS to support the optimal topology design of the horsehead pumping unit .

文章应用有限元分析软件ANSYS，采用变密度法建立拓扑优化模型，对抽油机驴头进行拓扑优化设计。

This is really my first DSO image . Now I still remember how exciting I was when saw the shadow of the Horsehead Nebula .

这是我第一张真正意义上的深空，我现在还记得当我看见马头星云影子时的兴奋。

Status and Prospectives for Silver horsehead , Branchiostegus argentatus ( Cuvier et Valenciennes ) Resource off Sea of South-Central in East China Sea

东海中南部外海银方头鱼资源状况及开发前景

With the help of the vector method , the general expressions for the displacement , velocity and acceleration of the polished nod on the swing horsehead pumping unit ( SHPU ) was introduced .

用矢量法导出了旋转驴头式抽油机悬点运动的位移、速度和加速成度的表达式。

On the basis of an analysis of the current abdicating mechanism for the pumping unit horsehead , the authors present a ' variable-angle ' ' self-abdicating ' mechanism , and make a discussion on the design of this new mechanism .

在分析现有抽油机驴头让位机构的基础上，提出变角自让位机构，并对其设计计算进行了分析。

Below the frame center and just to the right of Alnitak lies the Horsehead Nebula , a dark indentation of dense dust that has perhaps the most recognized nebular shapes on the sky .

画面中央偏下，也就是位在参宿一右方的马头星云，由致密的黑暗尘埃组成，应当是天空中最被认可的形状。

The trip preventer uses the inertia in up and down movement of the horsehead , through driving the rotating mechanism of the worm wheels and worms with balance wheel makes sucker rod revolve undirectionally , thus the trip accident can be prevented effectively .

抽油杆自动旋转防脱器是利用驴头上、下运动中的惯性，通过摆轮驱动蜗轮、蜗杆旋转机构，从而带动抽油杆作单向旋转，可以有效防止抽油杆脱扣事故的发生。

The pumping unit described in this article is an offset-type unit with the walking beam and horsehead as an integral whole , and on which the swing angle of the beam is up to 90 ° and the minimum drive angle of the four-bar linkage is 32 ° .

大摆角抽油机是游梁、驴头为一体且游梁摆角达90°、四连杆机枸最小传动角为32°的偏置式抽油机。