Objective:To investigate the effect of femoral intertrochanteric fracture in elderly patients treated with the double heads compressive hollow screw.
目的：探讨双头加压空心螺钉在老年股骨粗隆间骨折中的应用价值。
Using 9 cadaver femora instrumented, the fracture of femoral neck was fixed with 3 hollow double heads compression screw, 3 solid screw and Trifin respectively.
利用9具成年新鲜股骨尸体标本，分别采用中空双头螺纹加压钉、实心螺纹钉、三翼钉进行股骨颈骨折内固定，并进行生物力学实验。
Objective: This article introduces about the three double heads empty compression screw (DECS) and its clinical application for treatment of fracture of femoral neck.
目的：探讨治疗体骨颈骨折采用三枚双头空心加压钉的生物力学原理和临床应用。
The 3 hollow double heads compression screw appear to offer distinct advantage over the 3 solid screw, trifin in the against pressure, against bending force, torsional strength and torsional rigidity.
三枚中空双头螺纹加压钉比三枚实心螺纹钉、三翼钉在抗压、抗弯、抗扭强度和刚度上占有一定的优势。
Families headed by males had double the average income that families with female heads had.
男性持家的家庭平均收入是女性持家家庭的两倍。
Like the double-headed eagle adopted by European emperors since Byzantine times, the EU now tries to act as one body with two heads.
欧盟如今想要采取一个体系两位首脑的做法，就好像欧洲君主自拜占庭时期开始用双头鹰作徽记一样。
The result is a double-layer distribution of charges-for example, a plane of negative heads and an adjacent diffuse cloud of positive counterions.
这就产生了电荷的一种双层结构分布——比如说一个负电荷的平面和紧邻着弥散着的带正电的相对离子云。
The principle of cam testing with single gauge head and double gauge heads is analyzed and the measurment method with single gauge head in engineering practice is determined.
本文通过对单测头与双测头的原理进行比较分析，确定了在实际应用中使用单测头进行测量的方案。
This model adopts 24 filling heads with the double row, is mainly characterized by large capacity, after two-in-one combined convey then enter into next procedure.
该机型采用双排24头灌装，主要特点是产能大，在二合一并道输送后进入下一道工序。
Assembly tools for screws and nuts - Double-headed open-ended engineers 'wrenches - Length of wrenches and thickness of the heads.
螺钉和螺母用装配工具。工程用双头开口扳手。扳手长度和端口厚度。
The hammer heads and the food basins can be arranged in single row or in double row.
锤头和食品盆可以单排或双排设置。
The features of double walled cylindrical explosion containment vessels closed with flat heads are presented.
本文介绍了平封头的圆柱形双层爆炸容器的设计特点。
Adrenalin junkies can get their fix by balancing sharp hatchets and double-edged axes over their heads before hurling them at painted wooden bullseyes.
喜欢这种刺激运动的人会先在头顶平衡一下锋利的短柄小斧和双刃斧，瞄准位置，然后再向彩色的木制靶眼投过去。
Assembly tools for screws and nuts - double - headed open - ended wrenches, double - headed ring wrenches and combination wrenches - maximum widths of heads.
螺钉和螺母装配工具。双头开口扳手双头环形扳手和组合扳手。最大头部宽度。
Assembly tool for screws and nuts - open - end double - head engineers wrenches, double - head box wrenches and combination wrenches - maximum outside dimensions of heads.
螺钉和螺母装配工具。双头开口扳手双头环形扳手和组合扳手。最大头部宽度。
Double fixed distance laser heads, two -way moveable double laser heads, Automatic feeder, Infra-red positioning system, Push-Pull changing work table.
加装普通固定面积双激光头，互移双激光头，上料架，红外定位装置，左右推拉式工作平台。
Compared with the present sprayer with a single spray head and the present sprayer with double spray heads, the utility model has the advantage that work efficiency is increased by about one time.
这样就能实现每次二行的喷洒农药作业，比现有的单、双喷头喷雾器提高工效近一倍。
It can complete the cutting through single or double saw heads. It is necessary equipment for PVC window processing.
具备分别进行单、双头切割的功能，是塑窗加工行业中的必备设备。
Assembly tools for screws and nuts - Double-headed, flat and offset, box wrenches - Length of wrenches and thickness of the heads.
螺钉和螺母用装配工具。双头平直和弯头套筒扳手。扳手长度和端口厚度。
The double-pivot structure avoids the appearance of big and small, rubber roll heads;
胶辊双支点结构避免出现胶辊大小头；
The double-pivot structure avoids the appearance of big and small, rubber roll heads;
胶辊双支点结构避免出现胶辊大小头；
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