| 摘要 |
<p>Ducts for transporting and/or distributing fuel gases and liquefied gases, including a polyethylene layer and an inner and/or outer polyamide layer. Such ducts may advantageously be joined together by adhered sleeves to form medium- or low-pressure gas transport or distribution systems. Alternatively, they may be fitted within existing metal ducts. Said ducts may be produced by coextrusion.</p> |
