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。

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Captain: Not in that case, Sir. As soon as the overhaul work finished, I called for pilot for berthing operation.

船长：并非这个原因，先生。检修工作一完成我就呼叫引航员做好系泊准备。

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There are many contradictions between advanced technical equipments and relative obsolete management mode for operation and overhaul in subway power supply system of Guangzhou.

广州地铁供电系统较先进的技术装置与相对陈旧的运行、检修管理方式之间存在着诸多矛盾。

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As for GM's European operation, it has needed a massive overhaul for years, but because of political pressures and resistance from European labor unions, the company has been able to make only baby steps thus far.

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Giordano's management also took the opportunity to overhaul the company's inventory system, improving the operation's just-in-time supply chain.

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