There exist kinds of damages and defects at active pipelines owing to mis-installation, corrosion from harmful medium, geological environment change, sea water scouring and fishing.
油气管道在运行过程中，难免受到初始安装不当、地质环境变化、油气中有害介质、海水冲蚀以及渔业捕捞等的影响，从而造成各种损伤和缺陷。
The article introduces the geological conditions, design and construction, present situation of the defects and the defect treatment measures of Nanling tunnel.
介绍了南岭隧道地质条件、原设计及施工概况，以及隧道病害现状及本次病害整治措施。
Many defects exist in the operation mechanism of geological and prospecting enterprises owing to historical reasons. One of defects is budget management impropriety.
由于历史原因，不少地勘企业运行机制存在许多缺陷，其中预算管理薄弱便是其中之一。
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