目的观察可吸收性海藻酸钙膜引导骨再生过程中哈弗氏管的再建及意义。
Objective To research the effect of bioabsorbable calcium alginate film in guided bone regeneration by the study of Haversian remodeling.
对哈氏合金U形管换热器频繁出现的腐蚀断裂问题，从材质、运行工况等方面进行了分析，采取了更换材质等防腐技术措施，收到了很好效果。
The frequent cracking in U-tube heat exchanger caused by corrosion at Lanzhou Petrochemical Corporation were analyzed in terms of materials, running conditions, overhaul operation etc.
对哈氏合金U形管换热器频繁出现的腐蚀断裂问题，从材质、运行工况等方面进行了分析，采取了更换材质等防腐技术措施，收到了很好效果。
The frequent cracking in U-tube heat exchanger caused by corrosion at Lanzhou Petrochemical Corporation were analyzed in terms of materials, running conditions, overhaul operation etc.
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