空心螺钉 [机] hollow screw
- 而向上爬时,攀岩者会在冰上规则地钉入钛制空心螺钉。
While ascending, the climber regularly sets a hollow titanium screw into the ice. - 这个新设计使成本大大降低钻井相比,空心螺钉轴。
This new design enables costs to be reduced greatly compared to drilling a hollow screw shaft. - 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。
Objective:To investigate the effect of femoral intertrochanteric fracture in elderly patients treated with the double heads compressive hollow screw.
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