螺纹

A method for making thread with bare feed rod is introduced through practical usage,the range which this method can be applied in is presented.

通过加工实例，介绍了一种用光杆车螺纹和攻套螺纹的方法，并给出了该种方法的适用范围。

Combined with the macro-morphology appearance analysis and working conditions of failure casing, the paper reached a conclusion that it is due to the impact and friction which come from the drill tools made the fatigue cracks formation on the casing thread root, and eventually leading to casing rupture failure, the material defects in failure casing accelerated crack initiation and growth.

摘 要：某井在钻井作业过程中，发生了上层Φ244.5 mm技术套管断裂失效事故，为了分析事故原因，对失效套管材料的化学成分、金相组织和力学性能进行了检测分析，结合套管失效形貌的宏观分析和套管使用过程中的现场工况分析，得出了套管螺纹发生断裂失效的原因是钻具对套管的撞击、摩擦，使套管螺纹根部产生疲劳裂纹，最终导致套管断裂失效，失效套管的材料缺陷加速了裂纹的萌生和扩展。

However, there is still a problem with the plastic/rubber grommets being used where the socket screws into the base of the lamp. On all except 76117 and 76320, the grommet is coming loose and traveling down the length of the cord, so there is metal rubbing directly against the cord. On some, it appears that the grommet isn't the right shape or the right size to fit properly, so while it may sit in the opening correctly for a while, it doesn't stay there.

不管怎么样，这里还是有一些问题出现在当我们把灯装进这些塑料或橡胶的螺丝孔子时，所有的产品除了76117和76320，在这个装配环节上都出现了滑丝和螺纹太短的现象，所以这里会出现金属和橡胶件配合出现不适合的现象，同时有一些出现螺纹形状不对的或都是尺寸不对，以至于装不进去。

The main products for the machine tap, tap of the screw, nut Taps, Taps spiral groove, Lo pointed ladder Tap Tap, tap hand, squeezing Tap, tap sets Lo, L-tap, straight trough Tap, tap and the roller teeth Tap kind of increase, lengthening Taps, and to undertake Gezhongfeibiao thread and special-shaped tool.

主要产品为各机用丝锥、管螺纹丝锥、螺母丝锥、螺旋槽丝锥、螺尖丝锥梯形丝锥、手用丝锥、挤压丝锥、螺套丝锥、左旋丝锥、直槽丝锥、滚牙丝锥以及各种加大丝锥、加长丝锥，并承接各种非标及异型螺纹工具。

2 This cable entry is mating to joint box, meter, and other electrical equipments. The specifications and sizes, basic on the requirements of explosion protection performance, can be designed by the customer. Except of special requirements, they are provided as: NPT, M, G,R threaded connections. The specifications for thread are listed in Table 1

6.2 引入装置是为接线箱、仪表及电气设备等配套使用的，其连接规格及尺寸，在保证电气防爆性能指标外，可以耕具需要由用户设计指定，除有特殊要求外一般提供：NPT、M、G、R等各类螺纹连接形式，螺纹规格见表2。

Knife-edged threaded implant with a screw angle of 60°is more appropriate to be used as orthodontic anchorage.

2.60°螺纹顶角的刃状螺纹型种植体比较适合做口腔正畸支抗体。

Push plate aperture to be compared with cores of large-diameter slightly larger number of threads to prevent thread appears scratches.

推板的孔径必须比型芯螺纹的大径稍大一些，以防止螺纹出现划痕。

Master and slave are double-headed screw thread threaded rod.

主、从动螺杆的螺纹均为双头螺纹。

Only three leverage the amount of needles and micrometer and the necessary clamping screw of the bracket can then be processed in the original survey data will be able to find the pitch diameter of the.

只需要三根量针和杠杆千分尺以及必要的夹持螺纹的支架即可，然后把原始测量数据进行处理就能求出螺纹中径了。

Baoji City Gem Oil Units gold thread gauge to test the existing staff 10 people, including senior engineer 3 people, 4 people engineers, responsible for drafting the national oil drilling screw connector standard gauge standard gauge calibration as well as the norms in the drafting of the oil metrological verification department and Natural Gas Corporation, a point of order.

宝鸡市金台宝石石油专用螺纹量规测试所现有职工10人，其中高级工程师3人，工程师4人，负责起草了国家石油钻具接头螺纹标准、量规标准、量规的校准规范以及参与起草了石油天然气总公司部门计量检定规程。

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