It is a best method selected possibly nowadays for recovery of function of an old gas pipeline to insert a thin-walled polyethylene lining into a steel pipeline by the way of non-excavation.
用非开挖方式向钢管道内穿插薄壁聚乙烯内衬是目前可选择的恢复旧燃气管道使用功能的最好方法。
Therefore, in order not to waste oil and gas resources, development and utilization of non-pipeline sulphur gas has also been mentioned in the motion.
因此，为了不浪费油气资源，开发利用非管输含硫天然气也提到了议案上。
Therefore, in order not to waste oil and gas resources, development and utilization of non-pipeline sulphur gas has also been mentioned in the motion.
因此，为了不浪费油气资源，开发利用非管输含硫天然气也提到了议案上。
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