Angular plywood arms wraps a sharp-angled shell comprising a corrugated steel roof and clear plastic sides that allow plenty of light to enter.
角胶合板材料包裹了尖角的外壳，壳体由波纹钢屋顶和透明塑料面构成，让足够的光线进入。
2
The round and sharp-angled t wave is remarkable differ from the ECG of the Hypokalemic. So it is the characteristic t wave's change of the congenital heart disease.
圆钝尖角改变与低血钾改变明显不同，易于区分而成为先天性心脏病特征性改变。
3
Conclusion the round and sharp-angled t wave is the characteristic change of the congenital heart disease, it is of great value to diagnose the congenital heart disease.