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<p>are usually buried. The oil is moved through the pipelines by <a href="page.php?w=pump">pump</a> stations along the pipeline. Natural gas (and similar gaseous fuels) are pressurized into liquids known as <a href="page.php?w=Natural-gas_condensate">natural gas liquids</a> (NGLs). Natural gas pipelines are constructed of <a href="page.php?w=carbon_steel">carbon steel</a>. <a href="page.php?w=Hydrogen_pipeline_transport">Hydrogen pipeline transport</a> is the transportation of hydrogen through a pipe. Pipelines are one of the safest ways of transporting</p><p>
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