Buried, highimpact poly (vinyl chloride) (PVC-HI) piping systems for the supply of gaseous fuels -- Part 2: Fittings for a maximum operating pressure of 200 mbar (20 kPa) mbar (20 kPa)— 24 стр.
83.140.30 Plastics pipes and fittings for non fluid use / Пластмассовые трубы, фитинги и клапаны
75.200 Petroleum. Including petroleum and natural gas storage devices, distribution systems, pipelines, petrol stations, dispensing devices, etc. / Оборудование для переработки нефтяных продуктов и
