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。
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。
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。
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。
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。
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。
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 utility model relates to a fast anvil vice which is a simple, convenient and practical new device which can arbitrarily regulate a vice travel without a screw rod rotating.
这是一种不通过螺杆旋转任意调节虎钳行程，简单、方便、实用的新型装置。
The invention is characterized in that the fibre is firstly pre-dewatered in a dewaterer set before the filling screw rod and is dewatered additionally in the filling screw rod.
本发明的特征在于，纤维在填塞螺杆之前首先在脱水机组中进行预脱水并且然后在填塞螺杆中进行附加地脱水。
The utility model provides a novel supporting pulling device which is provided with a screw rod connected with the center of an adjusting supporting body through inner threaded holes.
本实用新型提供了一种新颖的顶拔器，它有一根螺杆与调节支承体的中心内螺孔联接。
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。
Objective To discuss clinical application of the new thoracolumbar spinal anterior screw - rod fixation system.
目的探讨应用新的脊椎前路钉棒系统进行胸腰段脊柱前路手术的效果。
The therapeutic effect of nerve decompression and vertebral canal plasty combined with the screw-rod system fixation of posterior pedicle of vertebral arch and the fusion of bone graft is fine.
神经减压和椎管成型辅以后路椎弓根钉捧系统同定及植骨融合术治疗退行性下腰椎不稳疗效优良。
Intraoperative posterior approach general spine pedicle screw-rod orthopaedics fixation system used and iliac bone block were implanted in space of posterior atlantal arch and axial vertebral plate.
术中应用经后路通用脊柱椎弓根钉棒矫形固定系统固定，同时在寰椎后弓和枢椎椎板间大量髂骨植骨融合。
Intraoperative posterior approach general spine pedicle screw-rod orthopaedics fixation system used and iliac bone block were implanted in space of posterior atlantal arch and axial vertebral plate.
术中应用经后路通用脊柱椎弓根钉棒矫形固定系统固定，同时在寰椎后弓和枢椎椎板间大量髂骨植骨融合。
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