Causes of leakage of acid-resisting ceramic tile lining in sulfuric acid leaching tank and the protective measures
某厂硫酸浸出槽渗漏原因分析及防护措施
Renovation of the orang-utan enclosure was completed in January. Re-tiling of the fountain in the garden terrace was completed in July. Engineers have been working on fixing the foam on the shuttle's external tank.
猩猩笼舍的修葺工程已于一月完成,而平台花园喷水池的重铺瓷砖工程亦已于七月竣工。工程师们一直在致力于固定航天飞机外壳的隔热泡沫材料。
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