Objective: to assess the value of central venous catheter in treatment of refractory urinary retention in children.
目的：评估深静脉导管在小儿困难导尿中的应用价值。
Objective to evaluate the clinical value of using erythromycin-induced pleural adhesions in the treatment of refractory spontaneous pneumothorax.
目的观察红霉素胸膜粘连术对难治性自发性气胸的治疗价值。
Recycling technology of aluminosilicate and corundum refractory waste to prepare high value ceramic grinding media was studied.
研究硅酸铝及刚玉质耐火材料废料的再生利用技术。
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