... double-point tool双刃刃具 double-pointed nail双头钉 double-pole cutout双极断路器 ...
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... 双头合钉 double headed nail 双头钉 double headed spike 复式集管箱 double header ...
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双头螺丝钉 dowel screw ; dowel l screw
双头穿钉 double arming bolt
双头螺钉 dowel screw
双弯头螺钉旋具 double offset screwdriver
哈芬槽式预埋双头锚钉 capstan lifter
双锥头合钉 Double cone dowel ; Dowel double-cone
双头紧定螺钉扳手 end set screw wrench ; double-end set screw wrench ; double end set screw wrench
微型双头加压螺钉 Micro double-headed forcing screw
以单枚双头加压螺钉 DCS
方法：应用中空双头加压螺纹钉加折断式螺钉治疗股骨颈骨折。
Method: Treatment of femoral neck fractures using hollow double ends compressive screws and breaking screws.
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。
Objective: This article introduces about the three double heads empty compression screw (DECS) and its clinical application for treatment of fracture of femoral neck.
本文提出了一种新型钉式双锚头压环锚杆，同时介绍了此种锚杆的技术参数，作用机理，现场试验以及工程应用情况。
A new nail-type dual anchor-root press-ring anchor was introduced. And the technical parameters, mechanism, field tests and engineering practice were included.
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