T梁桥和空心板梁桥
T-shaped beam bridge and hollow slab bridge
积木式空心螺杆
Building block hollow screw
加压空心螺钉
compressive cannulated screw
空心螺钉
percutaneous cannulated screw
Hollow screw
Cannulated screw
Cannulated screws
Cannulated screwlated screw
Hollow screws
Hollow compression screw
canulated screw