管道建设和维护，管道和下水道系统改建领域的工程咨询服务，以及环保技术咨询。
Consulting engineers for pipeline construction, maintenance, rehabilitation of pipe and sewer systems and consulting for environmental technology.
管道建设和维护，管道和下水道系统改建领域的工程咨询服务，以及环保技术咨询。
Consulting engineers for pipeline construction, maintenance, rehabilitation of pipe and sewer systems and consulting for environmental technology.
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