螺纹

Methods:Choose 126 anterior teeth of 112 patients at random,age from 21 to 46, 56 teeth were restored with cement screw post and 70 teeth were restored with glassfiber post,then all cases were restored with porcelain fused metal crown.

随机选取21—46岁的病例112例共126颗前牙进行即刻修复，其中56个牙制作螺纹桩核，70个牙制作纤维桩核，桩核完成后均行烤瓷全冠修复。

Make sure not to damage socket threads when using metal lifting plug,screw the plug out of the socket after litfing.

如果用金属提升塞提吊电极，不得损伤接头孔内的螺纹。过后，应将提升塞旋出。

An integrated unit of ball screw stripping,ball bearing tapered wedge and fixed-distance pull off was adopted in the design of injection mould for screw plug.

在螺塞注射模具设计中，采用了滚珠丝杠脱模装置和滚珠、斜楔拉模、定距联合装置，利用滚珠、螺母、丝杠及齿轮传动自动拧出螺纹塑件，实现塑件自动脱模；利用滚珠、斜楔、滑块机构拉开定模板和浇口板并控制其拉开距离，从而达到自动生产目的。

It is technically used to weld the screw bottom plate and fixed plate of the auto oil and fuel filters.

此机专门用于汽车机柴油滤清器螺纹盖板和固定板间的焊接。

It is soft and has low mechanical properties (bending and compressive strength, hardness, stiffness, shock and splitting resistance and nail and screw holding ability).

它是软的，具有较低的力学性能（弯曲和压缩强度，硬度，刚度，冲击和分裂抵抗和螺纹钉和持有能力）。

ABSTRACT: Objective To compare the biomechanical characteristics by designing newlymanufactured cortex selftapping interlocking screw matched with interlocking nail.

目的 设计与新型髓内钉相配套的双皮质自攻螺纹交锁螺钉，并对其生物力学性能进行对比研究。

Therefore, in order to enable the screw to smoke, Pai oil separated from the mouth, the screw thread section of the length of at least larger than a lead.

因此，为了使螺杆能吸、排油口分隔开来，螺杆的螺纹段的长度至少要大于一个导程。从上述工作原理可以看出，螺杆泵有以下优点

Therefore, in order to enable the screw to smoke, Pai oil separated from the mouth, screw thread length is greater than at least one lead.

因而，替了使螺杆能呼、排油口合隔启往，螺杆的螺纹段的少度至多要小于一个导程。

In this way, the formation of a groove it ABCDEA "∞" shape of the seal space (such as single-head screw, the axial groove to Shun Rao screw plate to the mouth through the smoke emission and can not form a seal).

这样，凹槽ABCDEA也就组成一个&∞&形的密封空间(如采用单头螺纹，则凹槽将顺轴向盘饶螺杆，将吸排口贯通，无法形成密封)。

The swamer can seal bottle which matches plasic positions, various size of mouth screw, it is made of production line with washer and filler, with perfect performance, reliable operation, good sealing, compact construction, easy in maintrnance, long use .

本机适用于各种螺纹配合的不同规格塑料瓶盖于瓶子旋合，它可于冲瓶机、灌装机等组成生产线，该机具有性能完善、操作方便、工作可靠、旋盖平紧、结构紧凑、维修方便、使用寿命长等优点。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失