不动管环缝焊接机是涉及大型管件环缝焊接机的改进。
The invention discloses a circular seam welding machine for fixed pipes, which relates to the improvement on circular seam welding machines for large pipes.
结果表明扶手型碳纳米管环的能谱结构与环的直径有关。
The results show that ATCNTs' energy band structure is relation to torus diameter.
该APC40有16个旋钮，由每个发光二极管环包围。
作为理想的电磁元器件，碳纳米管环引起了人们的特别的注意。
As an ideal electromagnetic element, the carbon nanotube ring (CNTR) has attracted much interest ever since its discovery.
在研究管环相贯数学模型的基础上，对管环相贯焊接坡口数控切割运动进行了研究。
Based on the study of mathematical model of intersecting for pipe and annulus, NC cutting of welding groove for intersecting of pipe and annulus was studied.
在计算排出口压力计算过程中，考虑了由于抽油杆柱旋转引起杆管环空气液两相流摩阻的影响。
To calculate discharge port pressure, this article considers the influence on frictional pressure drop in the gas and liquid two-phase flow between rod and tubing owing to rotation of rods.
指出加强弯管防腐过程中各个环节的质量控制，可以有效地保证钢质弯管环氧粉末涂层的稳定性，提高生产效率和钢制弯管的防腐质量。
It is pointed out that the sound quality control measures can effectively ensure the stability of epoxy powder coating for hot-bending bend, increase the productivity and coating quality.
浮鞋能够防止环空中的水泥浆向套管内流动这种回流或者U型管效应的发生。
The float shoe prevents reverse flow, or U-tubing, of cement slurry from the annulus into the casing.
在套管或衬管与周围的水泥环之间所形成的小间隙，这些间隙是由于在固井期间或固井之后温度或压力的变化所致。
A small gap that can form between the casing or liner and the surrounding cement sheath, most commonly formed by variations in temperature or pressure during or after the cementing process.
在安装系列4700夹管阀时，建议在阀门法兰后面采用镀锌钢支撑环加固。
When installing the Series 4700, it is recommended that galvanized steel back up rings be used behind the valve flanges.
采用考虑位移的土压力计算方法计算环向土压力，得出首节管道和后续管节最大土体反力的计算公式。
By considering displacement for calculating circular earth pressure, the maximal earth counterforce formulas for the heading and the latter pipelines are deduced.
对环板行波管的导波特性进行了详细的数值模拟分析。
A detailed numerical calculation for the propagating wave's dispersion characteristics has been made.
然而，当用它的皮肤卷成皮管修复环咽缺损时，由于太臃肿会导致阻塞。
However, when the skin of it was tubed for circumferential defects, the bulk could result in obstruction.
在这段时间里，螺杆回复到原位，同时旋转以实现下一环节的动作，即将熔化的材料带入进胶管前端。
During this time, the screw moves back while turning to carry out a new proportioning by bringing material melted to the front of the sprue tube.
把火焰移开，在连接部位一或两点位置将焊料注入直到管件端口出现一环焊料为止。
Remove flame and feed solder into the joint at one or two points until a ring of solder appears at the end of the fitting.
控制合适的操作条件，在大油气管线进分馏塔入口处增加蒸汽环管，可以有效防止结焦。
Coking at the inlet of large gas line to fractionator has been effectively prevented by setting up steam circle pipes under appropriate operation conditions.
聚丙烯环管反应器是一种结构特殊的设备，也是工艺流程中十分重要的设备。
The polypropylene liquid bulking loops has a special structure and is an important device in the technological process.
目的探讨导尿管球囊扩张治疗环咽肌失弛缓症的可行性。
Objective To explore the feasibility of catheter sacculus expanding therapy for cricopharyngeal achalasia.
采用机理建模方法，研究了丙烯在环管反应器中的液相本体聚合过程。
The liquid phase bulk propylene polymerization in loop reactor was simulated based on the polymerization mechanism.
研究了玻璃纤维增强环氧圆柱管作为缓冲装置的撞击吸能特性，并与铝合金圆柱管的吸能特性进行比较。
The crashworthiness of grass fiber reinforced epoxy tubes as collision bumper is studied and a comparison of absorption property with aluminum alloy tubes is made.
介绍该电站水轮机进水环管、机盖和喷嘴等安装工艺方法，为相似机组的安装提供借鉴。
The paper presents the installation method of main parts such as intake annular pipe, cover and nozzle, providing reference for similar projects.
以水和正己烷作为介质，考察了通入空气对内管加热的竖直圆柱形环隙内的沸腾传热性能的影响。
Heat transfer of nucleate boiling of water and n-hexane in a vertical cylindrical annulus with inner side heated has been experimentally investigated.
本文在840 ~ 950k范围内应用单脉冲化学激波管测定环氧氯丙烷的裂解反应动力学。
The chemical kinetics for the pyrolysis of epichlorohydrin was studied by single pulse shock tube in 840-950k.
提出带孔盖板的自由液浸式环氧灌注的圆柱管形换能器声学结构模型。
This paper presents an acoustic structure model of free—flooded cylindrical transducer installed with holed end-caps.
本文介绍了采用大功率深穿透激光焊接不锈钢制压力容器管子—管板环缝的试验结果。
This paper introduced the experiment of applying high power, deep penetration laser welding stainless steel tubes-tube plates.
经过咨询专家意见，并采用航海上传统因素分类方法和“人机环管”的分类方法，得出了分层表示的航线综合评价指标体系。
By means of inquiring some specialists and scholars, traditional sort method and "MMEM" method the author achieves the delaminated indices of passage compositive assessment system.
本文分析计算了石油钻井工程偏心环空中内管转动的螺旋流动。
In this paper the spiral velocity of eccentric annulus with inner pipe turned is analysed and computed.
分析结果表明，环空偏心距、内管冲程、内管冲次对瞬时流量分布的影响较为明显。
Analyses indicate that the eccentricity, the stroke and the frequency of the inner cylinder all affect the instantaneous flow rate distribution remarkably.
本文对结构和受载都非常复杂的聚丙烯环管反应器建立了有限元分析设计模型。
In this thesis, finite element analysis is carried out on a large polypropylene tubular loop reactor which is complicated both in structure and loadings.
本文对结构和受载都非常复杂的聚丙烯环管反应器建立了有限元分析设计模型。
In this thesis, finite element analysis is carried out on a large polypropylene tubular loop reactor which is complicated both in structure and loadings.
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