This new design enables costs to be reduced greatly compared to drilling a hollow screw shaft.

这个新设计使成本大大降低钻井相比，空心螺钉轴。

The equal wall thickness hollow screw pump rotor is mainly applied to the transport of viscous liquid.

本实用新型主要应用于粘稠液体的输送。

The screw consists of core spindle and several hollow screw segments which can be replaced easily for different materials.

该螺杆由芯轴和几个空心螺杆段组成，对于不同的物料，只需更换其中某些空心螺杆段即可。

Objective To investigate the outcome of trans-scaphoid perilunar dislocation treated with bone anchor and AO/ASIF hollow screw.

目的探讨骨锚和空心钉联合应用于经舟骨月骨周围脱位的临床疗效。

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。