• <progress id="47fdn"><track id="47fdn"></track></progress>

    <rp id="47fdn"><object id="47fdn"><input id="47fdn"></input></object></rp>

    Polyolefin

    Any of a wide variety of thermoplastic compounds produced by the polymerization of olefins, such as styrene or ethylene. Hence, polyolefins include such plastics as polystyrene and polyethylene.

    All text and images are licensed under a Creative Commons License
    permitting sharing and adaptation with attribution. (See Copyrights for details.)

    PrintWiki – the Free Encyclopedia of Print
    About    Hosted by WhatTheyThink


    可打现金的麻将平台