The utility model provides an integral petroleum production tree, which is characterized in that a pipe cross and mutually connected main bars are a hollow and cuboid integral forging piece;
本实用新型提供一种整体式采油气树，其特征是四通和相互连接的主杆为一个空心长方体的整体锻压件；
Regulating regimes of metered heating system are analyzed by means of computer simulation. This paper gives the control mode of consumer heat inlet that applies to one-pipe cross-over heating system.
通过计算机模拟分析了计量供热系统的调节工况，给出了适用于单管跨越式供热系统的热力入口控制方式。
And in two places I need to cross a conduit with a 35 millimetres cold feed pipe.
但管外还要包隔热层而且电线管在两处要与35毫米的冷水管交叉，地方恰好不够。
But they 've got to be wrapped in lagging, remember. and in two places I need to cross a conduit with a 35 millimetres cold feed pipe. There's just not enough space.
但管外还要包隔热层而且电线管在两处要与35毫米的冷水管交叉，地方恰好不够。
The stress distribution of a curved pipe with an initial elliptic cross section under internal pressure was studied by using electric resistance strain method.
采用电阻应变测量技术研究了带有初始随圆度的弯管在纯内压作用下的应力分布。
By using the EYECAD, ISO drawings, cross sectional drawings, exact material tables and pipe specification tables can be accomplished.
EYECAD能生成可靠的ISO图纸、平剖图以及精确的材料表、工艺管线规格表等。
And it would define more tightly the terms cigarette, cigar, cigarillo, fine-cut tobacco and pipe tobacco in order to discourage the production of cross-over products.
而且这项提案还更严格地定义了卷烟、雪茄、小雪茄、细切烟和斗烟这些词语，以阻止交叉产品的生产。
Two routes can not be worn in the same tube, wire and heating, hot water, gas pipe between the parallel distance should not be less than 300mm, the cross should not be less than 100mm.
两路线不能穿同一管内，电线和暖气、热水、煤气管之间的平行距离不应小于300mm，交叉距离不应小于100mm。
Suitable for side expansion processing of Tee pipe fitting and Cross pipe fitting.
适合三通四通管件侧孔的预胀型加工。
In this paper, we have set up a mechanical model of the elastic-supported pipe conveying fluid and subjected to outside cross fluid flow.
本文建立了具有弹性支承的圆管在内外部流激发下的力学模型。
The experimental results are collected and compared on single experimental pipe, cross tube bundle, rectangle and triangle cross fin-tube.
对单根试验管、叉排管束、矩形截面超片管和三角形截面翅片管的试验结果进行了综合比较。
Adopting the cross design determines the optimal recipe of the special material for PE heating pipe.
采用正交设计确定了PE采暖管材专用料最佳配方。
The subway crossing project through Hongxu Road in Shanghai is the pipe-roof project with the biggest cross-section box culvert up to now in the world.
上海市中环线虹许路北虹路下立交工程是目前世界上在饱和含水软土地层中施工的横截面最大的管幕法工程。
By simulation of the tractor in straight oil pipe with obstacle, discussed the working situation of components and the relation between drag force and the force need to cross obstacle.
通过直管障碍的仿真实验，得出了牵引器在直管中越障时各组件的工作状态、直管越障阻力与设计牵引力的比例关系。
Control valve is a pipe attachment, which is used to change the channel cross-section and flow direction, the control flow of a medium transport device.
调节阀是一种管路附件，它是用来改变通路断面和介质流动方向，控制输送介质流动的一种装置。
On the basis of the modal analysis, the nonlinear finite element is used to analyze the dynamic response of suspension pipe bridge to cross wind excitation.
在模态分析的基础上，采用几何非线性有限元的分析方法，对悬索式管桥进行了横向风共振分析。
The longitudinal cracks along bond line and the transverse cracks which cut across the weld metal cross section inside weld metal were formed, while X65 pipe line steel was welding.
X65管线钢在焊接过程中，内侧焊缝金属出现横向和纵向沿熔合线方向的裂纹，横向裂纹贯穿焊缝金属横截面。
The evaporation model of micro heat pipe with triangular cross section was presented by analyzing both the heat transfer through the thin liquid film and the heat conduction along the heat pipe wall.
通过对薄液膜蒸发传热以及热管壁轴向导热的分析，对三角形截面微型热管的蒸发段建立了蒸发传热模型。
The influencing factors of coal arch camber in planomural coal bin and coal drop pipe with rectangular or circular cross section during coal drop are studied theoretically.
对落煤过程中平壁煤仓及截面形状分别为矩形、圆形的落煤管起拱的影响因素进行理论研究。
There are mainly two excitation mechanisms in the vibration of the thermo-well at the main pipe of reactor coolant loop under cross flow: turbulence and vortex shedding.
反应堆冷却剂回路温度计套管在流体流动冲刷下的振动主要有两种激励机理：湍流和旋涡脱落。
The operating situation in the cross pipe primary cooling process for COG is described.
本文对横管初冷器运行前后硫酸铵产量及系统运行情况进行了分析。
It has been introduced the principle and structure of necking machine for the front cross member pipe.
介绍了前横梁管材缩口机的原理及结构。
It is mainly caused by the ovalization of the cracked cross section and the changing of the lever-arm while the pipe is deformed when being bended.
试验表明，这是由于管道受载后，裂纹处管道截面变椭圆及由于管道弯曲变形导致加载过程中力臂的变化所引起。
The colonoscope rack setting auxiliary passage pipe is one double cavity passage pipe with elliptic cross section.
本发明是由一个双腔体的通道管组成，所述的双腔体通道管其截面呈非对称性椭圆形。
Pipe series: Elbow, tee, cross, movable joint, Bu core, reducer, pipe cap, choke plug, inside the wire, outside the wire, turned-over edge, increaser etc.
管件类：弯头、三通、四通、活接头、卜芯、大小头、管帽、堵头、内丝、外丝、翻边、异径管。
The motor drives the rotating rack to rotate through the belt pulley; and the cross bar and the pipe barrel beat the soybean plant for threshing.
电机通过皮带轮带动转动架转动，横杆和管筒拍打大豆植株脱粒。
The utility model relates to a flat hexagon pipe chute precipitating device, which is composed of a pipe chute, the cross section of which is a flat hexagon.
一种扁六边形斜管沉淀设备，它由截面为扁六边形的斜管组成。
The expansion joint comprises a corrugated pipe, the cross section of which is rectangular.
本实用新型包括波纹管，所述的波纹管的横截面为矩形。
The expansion joint comprises a corrugated pipe, the cross section of which is rectangular.
本实用新型包括波纹管，所述的波纹管的横截面为矩形。
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