Bend needle mechanism and looper mechanism are two important mechanisms in blind stitching machine.
弯针机构与成圈叉机构是暗缝缝纫机的两个重要机构。
Conclusion: We use L as arch length and H as chord length to bend syringe needle that is used to posterior superior alveolar nerve block anesthesia by intraoral injection. The success rate is 98%.
结论：以牙槽孔至颧下嵴起始部的弧长和弦长为标准弯制注射针头，采用口内注射法进行上牙槽后神经阻滞麻醉，成功率为98％。
In this case, no hard steel needle but soft tube is left in the human veins so the vein walls will not be punctured when people physically rotate or bend. The medical incidents are prevented.
这样，留在人的血管中的就没有硬的钢针，只有软管了，人的肢体转动或弯曲时，就不能刺破血管壁，避免了医疗事故的发生。
Then sufficient needle twists inside, at the same time at expiratory in bend ahead, but both hands cannot leave the ground.
接着足尖扭入内侧，同时于呼气中向前弯曲，但双手不能离地。
Then sufficient needle twists inside, at the same time at expiratory in bend ahead, but both hands cannot leave the ground.
接着足尖扭入内侧，同时于呼气中向前弯曲，但双手不能离地。
应用推荐