There should be no exposed screw heads.
螺钉头不应暴露在外。
Three-dimensional isothermal material flows in the metering section of injection molder with different screw heads during injection molding are simulated through POLYFLOW software.
针对头部无螺纹和有螺纹的注塑螺杆，使用POLYFLOW软件数值模拟了注塑机螺杆计量段熔料在注射过程中的三维等温流场。
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。
Use magnetic torque type capping heads, automatic grasping cover, screw cap, immutability torque capping function.
采用磁力扭矩式封盖头，自动抓盖、拧盖，有恒力矩封盖功能。
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。
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。
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。
应用推荐