The frequent cracking in U-tube heat exchanger caused by corrosion at Lanzhou Petrochemical Corporation were analyzed in terms of materials, running conditions, overhauloperation etc.
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。
3
There are many contradictions between advanced technical equipments and relative obsolete management mode for operation and overhaul in subway power supply system of Guangzhou.