Conclusion The treatment CT-guided percutaneous lumbar puncture needle inject 45% glacial acetic acid made cure one or more of renal cyst is of a simple and safe and efficient operation.
The disadvantage is lower mechanical strength, oil, solvent and acid poor, difficult to cure more expensive.
缺点是机械强度较低，耐油、耐溶剂和耐酸碱性差，较难硫化，价格较贵。
3
Based on monitoring result, the paper introduces acid rain status of Kuntn city, analyzes its reason, and suggests how to prevention and cure pollution of acid rain.