Holes For Screw 螺栓孔 ; 螺孔
Reaming holes for screw stays 为固定螺钉用的铰孔
Rewiming holes for screw stays 为不变螺钉用的铰孔
Check the screw holes of two flanges in the pipeline for alignment with reserved clearance.
检查管路两法兰的螺丝孔的是否有对正及预留的间隙。
Cone head drive screw with washer - used on roof for keeping fixing holes watertight.
锥头机螺钉垫圈-用于屋顶保持固定孔水密。
Conclusion. Intraosseous ultrasound is a highly reliable technique for the intraoperative assessment of pedicle screw holes before pedicle screw placement.
结论：对于在椎弓根螺钉放置前术中评估椎弓根螺钉进针骨通道而言，骨内超声检查一项很可靠的技术。
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