查询词典 screw

As such, magnetic particle inspection for the screw thread of the drill collar is very necessary and important.

因而钻铤内外螺纹的磁粉检测十分必要和重要。

This paper systematically introduces the basic principle and advantages of magnetic particle inspection, the stress analysis of the oil drill collar and the magnetic particle inspection for the screw thread of the oil drill collar.

本文系统介绍磁粉检测基本原理及优点，石油钻铤的受力分析，石油钻铤螺纹的磁粉检测。

According to the standards of the petroleum industry in China and the technical criteria and operation code designed by the JB/T4730.4-2005 for oil drill collar magnetic particle inspection, and upon conducting experimental inspections on oil drill collars according to this criteria and through the comparisons of ultrasonic testing results and theoretical analysis, it is found that this technical criteria is able to detect the defects of the screw thread effectively.

根据中国石油行业标准和JB/T4730.4-2005对石油钻铤设计了石油钻铤磁粉检测的工艺规范和工艺卡，并按此规范对石油钻铤进行实验探伤，通过对比超声检测的检测结果及理论分析，此工艺规范可有效的检测出钻铤螺纹部位的缺陷。

He screw ed up his mouth in a droll fashion.

他扭着嘴装出一副可笑的样子。

They have many years of production history, with injection molding machines, twin-screw extruder, drop hammer impact test machine, such as the most advanced production equipment and testing equipment, the annual production of various kinds of pipe, pipe fittings 15,000 tons.

具有多年的生产历史，拥有注塑机、双螺杆挤出机、落锤冲击试验机等国内最先进的生产设备与检测设备，年生产各类管材、管件1.5万吨。

However, when these tension screw s are loosened, the drumhead will become relaxed and its pitch gets lower.

相对的，当这些螺丝是松的时候音就变低了。

Screw Drumlin.

去他的德鲁姆林。

Based on the theory of fluid transmitting pressure, this paper gives a method of dual pressure-out curve for the diagnosis of screw pump well working status.

韩修廷 ，张男，李永东基于流体传压理论，给出了诊断螺杆泵井工况的双憋压曲线法。

The structure of knowledge base for mechanism kinematic schemes, screw theory and dual vector representation are introduced briefly.

简要介绍了机械运动系统方案设计知识库的结构和螺旋理论及对偶矢量表达。

Kept in accordance with the main livestock and poultry can be divided into:(1) pig farm equipment, mainly including the pigsty (sub isolated defecating type pigsty, ditches addition to manure type pigsty, some gap-type pigsty floors, full-seam floor and childbirth pigsty pigsty and other five), feeding equipment (with screw-type conveyor, reciprocating scraper type, scraper ring type, ring-chain plate and dilute feed, type and other types of pipeline transportation, as well as automatic feeding trough and a variety of feed trucks) and a drinking fountain ( There Duckbill type, cup type and nipple-type 3 type), in addition to fecal equipment with except feces forklifts, scraper-type reciprocating equipment, and water will, inter, inter dung manure equipment, etc.

按所饲养的主要畜禽可分为：（1）养猪场设备，主要包括猪栏（分隔离排粪式猪栏、明沟除粪式猪栏、部分缝隙地板式猪栏、全缝地板猪栏和分娩猪栏等五类）、喂饲设备（有螺旋输送式、往复刮板式、环形刮板式、环形链板式和稀饲料管道输送式等类型，还有自动饲槽和各种饲料车）、自动饮水器（有鸭嘴式、杯式和乳头式3个类型）、除粪设备（有除粪铲车、往复刮板式除粪设备和水冲除粪设备等）；（2）养牛场设备，主要有拴系、饲喂、饮水、除粪、挤奶、牛奶冷却、牛奶输送等设备；（3）养羊设备，主要是草场围栏、羊圈及剪毛机；（4）养鸡场设备，包括鸡笼、喂饲设备、饮水设备、除粪设备、孵化和育雏设备、集蛋装置和鸡粪热干燥设备等；（5）养鸭场设备，主要是自动填鸭器。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。