High pressure ring-shaped DTH drills are key equipment for underground high level large diameter long hole mining.
高气压环形潜孔钻机是地下矿山高阶段大直径深孔采矿的关键设备。
Particularly, the drying technique of using dry air for large diameter pipeline was applied for the first time in our country.
尤其干空气干燥技术，开创了我国大口径输气管道干燥施工的先例。
The large diameter tube well is an effective way for supplying domestic water with good water quality, large water volume, and cyclical recharge.
大口径管井取水水质好，水量大，能得到周期性补给，是解决生活用水的有效途径。
The paper discusses the design program of the production process for large diameter impregnated diamond bits, which offers a reference for people in this field.
本文详细介绍了生产大口径孕镶金刚石钻头的工艺设计方案，值得同业借鉴。
At present the large diameter slurry pipe jacking is the preferred construction method in project of urban water supply and drainage pipe and electric power pipe.
目前，大直径泥水平衡顶管掘进已成为城市给排水水管、电力管线工程等首选的施工方法。
Quenching for large diameter disc parts professionally.
专业适用于大直径盘类零件的淬火。
For small diameter pipeline it is more difficult than for large diameter pipeline.
对于小管径管道，其通球难度要大于大管径管道。
The perforations have a relatively large diameter and the perforation tunnel is deep.
射孔孔眼具有相对较大的直径，而且射孔孔道很深。
The product is suitable for storage containers and large diameter pipe heat preservation.
该产品适用于贮罐容器和大口径管道的保温。
The detection concept for large diameter beam parallelism with penta prism is introduced.
介绍了用五棱镜法检测大口径光束平行度的原理。
Super-large diameter electromagnetic flowmeter is one of the new type of water flowmeter.
特大口径电磁流量计是一种新型的大口径水计量仪表。
It is very difficult to grind tapered bore in a large diameter gear without dedicated equipment.
由于没有专用设备，大直径齿轮锥孔磨削非常困难。
The hydrodynamic characteristics of a large diameter cylinder in a two-layer fluid was considered.
研究了两层流体中大直径垂直圆柱体上的水动力特性。
The excavation of long shaft under high dip Angle and large diameter has a big difficulty and a high risk.
陡倾角、大直径、长斜井开挖施工难度大、危险程度高。
This article briefly introduced the demand and production situation of large diameter welded pipe in Russia.
简要介绍了俄罗斯目前对大直径焊管的需求及生产现状。
Channeling of high energy particle in the nanotubes-rope shows a large diameter of the channels and weak de-channeling factors.
高能粒子在碳纳米管绳里的沟道效应，显示大的沟道直径和微弱的退沟道因子。
Construction technology and quality control of large diameter super-deep bored pile under complex geological condition are introduced.
介绍在复杂地质情况下超深大孔径桩基施工技术和质量控制措施。
The present study offers theoretical support for the preload and engineering application of wire race ball bearings with large diameter.
研究结果为大型钢丝滚道球轴承的预紧研究和工程应用提供了理论指导。
During pipe line laying or large beam support welding, it often meets crossover of two or multi different axis large diameter pipe piece.
在管道铺设或大型梁架焊接过程中，往往会遇到两个或多个不同轴线的大直径管件相交的情况。
The theoretical and technical problems to be researched for large diameter drilling are outlined with its application prospect appraised.
简述了大直径钻井需要研究的理论和技术问题，并对应用前景作了评价。
The large diameter super wide quality rubber wheel makes the user's ground effectively protected, and increases the friction of the brake.
大直径超宽优质橡胶车轮使得用户地面得到有效保护的同时，增大了制动的摩擦力。
The extrusion molding process and main equipment for producing PE large diameter pipe with negative pressure sizing technology are studied.
对采用负压定径技术生产大管径聚乙烯管的挤出成型工艺及其主要设备进行了研究。
The way to value the bearing capacity and settlement calculation given herein are fit for the design of large diameter belled pile in China.
文中提出的承载力取值和沉降计算是一套适合于我国大直径扩底桩的设计方法。
Based on three vertical shear models of soil an approach to calculate the displacements of large diameter cylindrical wall is presented here.
采用三种筒内外土体对筒壁的纵向切力模型，提出了一种计算大直径圆筒挡墙结构变位的方法。
The flow distribution capacity of distributors is most important, especially for tower with large diameter, shallow bed or low pressure drop.
特别是对于大直径、浅床层、低压降的填料塔，分布器的流场均布性能尤为重要。
To solve this problem, in this paper, the authors will study precise shaping method of large module and large diameter internal meshing gear.
为了解决这个难题，本文对大模数大直径内啮合齿轮精确成形方法进行研究。
The large diameter mesophase pitch carbon monofiber in uniform size was obtained by controlling the matching of extrusion flow and drawing rate.
熔纺时控制了挤出流量和牵伸速率的良好匹配，获得了丝径均匀的大直径中间相沥青炭单丝。
This article introduces a new way which applies absolute zero position system of grating digital readout-instrument to measuring large diameter.
介绍了一种采用光栅数显装置的绝对零位系统进行大直径测量的新方法。
This article introduces a new way which applies absolute zero position system of grating digital readout-instrument to measuring large diameter.
介绍了一种采用光栅数显装置的绝对零位系统进行大直径测量的新方法。
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