GB/T 39997-2021加油站埋地用热塑性塑料复合管道系统标准
英文:Thermoplastic pipework for underground installation at petrol filling stations GB/T 39997-2021介绍: 国家标准《加油站埋地用热塑性塑料复合管...
英文:Thermoplastic pipework for underground installation at petrol filling stations GB/T 39997-2021介绍: 国家标准《加油站埋地用热塑性塑料复合管...