This method is convenient and effective for the primary design of projectile shap…

法所确定的尾锥角略有偏低，但仍可用于弹丸的初步设计。

Conclusion it can improve significantly negative shap pediatric intravenous infusion rate, especially for obesity, dehydration, peripheral circulation undesirable person.

结论负压穿刺法能显著提高小儿静脉输液成功率，特别对肥胖、脱水、末梢循环不良者。