修复或更换有缺陷和损坏的电话，电线和相关设备。
Repair or replace defective and damaged telephones, wire and associated equipment.
在不损坏风力机叶片的情况下，对其内部可能出现的缺陷进行检测和评估，是风力发电产业的重要课题。
It is an important theme of wind energy industry to test and evaluate the defects inside of wind turbine blades without destroying them.
套管缺陷的模式识别及其预测是套管损坏实时监测和预测研究中的重要问题。
Pattern recognition of casing defect and its forecasting is an important issue in the process of real-time monitoring and forecasting of casing damages.
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