A new method of pipelinerepair and maintenance is introduced.
介绍一种管道维修新工艺。
2
The paint is suitable for pipelinerepair which coated with old petroleum pitch. It is also used as new paint.
涂料适用于石油沥青类涂层管道大修或补口，也可作为新的涂料产品应用。
3
A special unit is used for delivering the plug into pipeline, it is appropriate for temporarily blocked and pressure-released pipe section in pipelinerepair operation.