Posterior screw rod system internal fixation; Thoracolumbar fractures; Effect.
后路钉棒系统内固定；胸腰椎骨折；疗效。
If the change rules generally to replace the expansion tyre, Zhang Xin, screw rod and slot.
如若变更规则一般要更换涨胎、张芯、螺杆和槽棒。
The catalyzing device is provided with a catalyzing pipe and a vortex catalyzing screw rod.
催化装置在于有一个催化管和涡流催化螺杆。
The cutting thickness is regulated by accurate ball screw rod which ensures localized precision.
锯切厚度由精确的滚珠丝抗控制，确保定位精度。
The inverter controls the adding of medicine accurately through regulate the speed of screw rod rotating.
变频器通过对螺杆的调速，进而对药品的投加量进行精确的控制。
A fastener screw rod-nut disassembly machine pertains to the technical field of building construction tools.
扣件螺杆-螺母拆卸机，属于建筑施工工具的技术领域。
Cylinder helical screw rod manufacturing technology plays an important role in the hydraulic and petroleum machinery.
圆柱螺旋面螺杆加工技术在水力、石油机械生产中占有重要地位。
The fixing element adopts a screw rod and a thread component which are connected with the bottle bodies respectively.
固定元件为螺杆和螺纹件，所述螺杆和螺纹件分别与一瓶体连接。
As the key component of extruder, the structure of screw rod has a great effect on the characters of puffed materials.
作为挤压膨化机关键部件的螺杆，其结构对膨化物料的性状有着十分重要的影响。
Complete stoppering of the vials usually by hydraulic or screw rod stoppering mechanisms installed in the lyophilizers.
使用安装在冻干机内的液压装置或螺杆全加塞。
The utility model discloses an anti-theft bolt which comprises a spline bolt head (1), a flange plate (2) and a screw rod;
本实用新型公开了一种防盗螺栓，它包括花键式螺栓头（1）、法兰盘（2）及螺杆；
A cantilever screw rod is arranged on the positioning bearing block and is ensured to be coaxial with a seal head cylinder body.
悬臂螺杆安装在定位轴承座上，并保证与封头筒体同轴。
The final shape helps the seal screw rod compressor assembly drawing, the contour dimensional drawing and each main detail drawing.
最终形成全封闭螺杆压缩机总装配图、外形尺寸图和各主零件图。
After lower part installs the horizontal screw rod, but can also cause the heavy item to make the small distance to move horizontally.
下部装上水平螺杆后，还能使重物作小距离横移。
Screw jack: Uses the screw rod or the fluctuation sleeve which impels by the screw rod goes against as the rigidity lifts a hoisting jack.
螺旋千斤顶：采用螺杆或由螺杆推动的升降套筒作为刚性顶举件的千斤顶。
Shenzhen Benwell Machinery Co. , Ltd. was established in 1997, devoting to the development and production of Screw rod type air compressor.
深圳市奔威机械有限公司，成立于一九九七年，一直以来致力于螺杆式空气压缩机的开发和生产。
With the upgraded locking device the axial force of the screw rod is reduced by half when roiling, Which makes the drum locked more reliably.
轧制时丝杆轴向受力减小一半，使转鼓被锁紧得更可靠。
The opening and the closing of the gate valve are realized by a manual pump; the past bulky gate valve with a hand-operated screw rod is replaced.
闸阀的开启和关闭靠手动泵来实现，取代了过去手摇丝杠的笨重闸阀。
The injection moulding device comprises a substrate nut (2), a process screw rod (4) screwed into the substrate nut (2), and two positioning nuts (1).
注射成型装置包括基体螺母(2)及旋入基体螺母(2)中的工艺丝杆(4)和两个定位螺母(1)。
Because the mechanism replaces a traditional screw rod and screw nut mechanism, the rotary furniture has simple structure, stable rotation and low cost.
用这种机构代替传统的螺杆螺母机构。可使旋转类家具结构简单，旋转平稳，成本降低。
But in the ceiling, whether we choose the asbestos board or choose the mineral wool board, usually hang with a screw rod, so that it can be more durable.
可是在吊顶时，无论我们选择的是石棉板还是选择的矿棉板，一般都是用螺丝拉杆悬挂，这样才能够比较经久耐用。
The invention broadens the adjusting range of the axial pulsation intensity so as to better meet the demand of screw rod axial pulsation of the squeeze machine.
本发明扩大了轴向脉动强度的调节范围，从而可以更好地满足挤出机螺杆轴向振动的要求。
The invention relates to a screw rod drilling tool used for petroleum drilling, and particularly relates to the technical field of petroleum drilling equipment.
本发明涉及一种用于石油钻井的螺杆钻具，具体涉及石油钻探设备技术领域。
In this paper, a model was deduced from the heating exchange of screw rod in cooling and was simplified with mathematics. Its construction was simple and practical.
根据螺纹钢筋轧后控冷中的热交换特点，从理论上进行了分析与推导，并利用数学方法进行简化，得到结构简单实用的数学模型。
When the driver bit of the screw rod needs to be replaced, as long as the clip ring is gently pulled downward. The screw rod is turned and the clip ring is released.
需要更换螺丝杆刀头时，只要轻轻向后拉动卡环，调转螺丝杆再放开卡环即可。
The lug boss is arranged between the screw head and the screw rod, and the external circumference of the lug boss is provided with a plurality of longitudinal grooves.
该凸台是设置在该螺头与该螺杆之间，其外周缘设有若干纵槽。
The upgraded drum locking device has integral drum locking blocks and a float screw rod, with the antivibration performance improved and the thread clearance eliminated.
改进的穿孔机转鼓器结构，采用整体压鼓块和浮动丝杆，消除了螺纹间隙，提高了抗振性能。
The hoisting jack calls the mechanical hoisting jack, is by the manpower through the screw vice-transmission, the screw rod or the nut sleeve achievement goes against lifts.
液压千斤顶又称机械式千斤顶，是由人力通过螺旋副传动，螺杆或螺母套筒作为顶举件。
Synchronized screw rod bottle separation and star-shaped disc transmission feed to achieve an absolute steady and high-speed rotation, and an easy and simplified operation.
螺杆分瓶、星盘同步传动的供料设计，使达到高速运转绝对稳定，而且操作容易简单。
Synchronized screw rod bottle separation and star-shaped disc transmission feed to achieve an absolute steady and high-speed rotation, and an easy and simplified operation.
螺杆分瓶、星盘同步传动的供料设计，使达到高速运转绝对稳定，而且操作容易简单。
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