中杆

Drill pipes often work in abominable conditions under alternating stress and the friction collision between drill pipe and borehole wall, which puts drill pipes in the weakest component in the whole drilling equipment and tools, the crack propagation results in perforation or part often emerge.

钻杆常处于交变应力并且在与井壁摩擦碰撞的恶劣条件下工作，往往成为整个钻井设备与工具中最薄弱的环节，由裂纹发展致穿孔或完全断裂时有发生。

Effects of imposex on reproduction and population of gastropods .;2. Concentrations of heavy metals were determined in 17 species of benthic gastropods collected from the marine area near Dang Gang Islands of Pearl River estuary.

对分布于珠江口担杆岛附近海域的 17种底栖腹足类重金属的含量进行测定，结果显示：所有种类的整体软体组织中所测得的Cu、Zn、Pb、Ni和Sn的含量都低于香港和广东省对海产品管理的规定标准。

Automobile safety supplies: SAS, GPS, Safety belt, Vehicle Traveling Data Recorder, TPM, Guard Against Theft Lock, Backing Radar, Glaring-prevented Mirror, Rear-view System, Bumper Burglar Alarm, Sensor, Safety Glass, Explode-prevented Film, Brake Apparatus, Brake Shoes, Frictional Material, Bulletproof Device, Rainwater-inducing apparatus, Braking Light, Passenger-inducing apparatus, PBS, Break Away from Roadway, Warning Device, Car first Aid package, etc.

安全气囊SRS、安全带、GPS导航仪、行驶记录仪、胎压报警器TPM、打气机、防盗锁、中控锁、HID氙气灯、安全头枕、儿童安全座椅、倒车雷达、防眩目视镜、后视系统、防撞杆、防盗器、监控器、传感器、示警仪、驾驶员酒精测量仪、安全玻璃、防爆膜、发动机电子防盗装置、巡航控制系统、制动器、刹车片、摩擦材料、防弹装置、雨水感应器、乘员感应器、预防碰撞制动系统PBS、制动灯、车道脱离、告警装置、汽车急救包等。

Its include: barrel, set up in the barrel components of the screw, fuel tanks, motor oil, the radio front plate, Radio Taiwan after the board and guide column, referred to the radio through the bottom of the front plate connected to the guide block guide Column, referred to Taiwan after the radio connected to the rod on the board.

其包括：机筒，设置在机筒元件中的螺杆，油缸、油马达、射台前板、射台后板、引导柱，所述的射台前板通过下端的引导块连接在引导柱上，所述的射台后板连接在活塞杆上。

Hydraulic hammer model in the figure, you may re-express or bucket excavator machine capacity, but also may indicate that the weight of hydraulic hammer, or drill rod diameter, or hydraulic hammer impact energy.

液压锤型号中的数字，可能表示挖掘机机重或斗容，也可能表示液压锤重量，或钎杆直径，或液压锤冲击能。

This is a hollow steel cylinder, usually about 2 to 3 inches in diameter, that can be moved several inches longitudinally in and out of the upper casting by means of a hand wheel and screw.

通过手轮和螺杆，尾座套筒可以在尾座体中纵向移入和移出几英寸。

Dynamic loading was carried out in the hat-shaped specimens of titanium alloy TC16 by split Hopkinson pressure bar technique. The microstructure and the phase transformation in the adiabatic shear band produced in TC16 alloy were investigated by means of OM and TEM.

利用分离式Hopkinson压杆技术对钦合金TC16的帽形试样进行动态加载，采用光学显微镜和透射电镜技术观测TC16中绝热剪切带内的微观结构和相变情况。

Dynamic loading was carried out in the hat-shaped specimens of titanium alloy TC16 by split Hopkinson pressure bar technique. The microstructure and the phase transformation in the adiabatic shear band produced in TC16 alloy were investigated by means of OM and TEM.

摘 要：利用分离式Hopkinson压杆技术对钛合金TC16的帽形试样进行动态加载，采用光学显微镜和透射电镜技术观测TC16中绝热剪切带内的微观结构和相变情况。

Main conclusions of this paper are listed as bellows: First hinge line is not particular in the complete-system, but the close bar on it will generate great stress while the initial stress is imported. So the structural shape has not only great relations with the position set of the hinge line, but also maximum impacts on the deformation of the whole body. Equal to the support part of jacks, the circumference of the fist hinge line will generate the greatest impacts while exchange.

本文研究的主要结论有：第一铰线在完成系中没有特殊之处，但在初期应力导入时，第一铰线上的闭合杆件会产生相当大的应力，因此，结构形状和铰线的位置的设定有很大关系，对结构整体变形也有最大的影响；第一铰线的周边相当于千斤顶的支承部，在替换支撑拆除千斤顶时会产生很大的影响。

The cDNA of human μOR with a six consecutive histidines tag at its carboxyl terminus had been introduced in the baculovirus genome under the control of the polyhedrin promoter.

含目的基因HμOR-6His cDNA的基因片段被整合在转录多角体蛋白基因的强启动子控制下的杆状病毒基因组中。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐