<track id="z55lf"><p id="z55lf"><output id="z55lf"></output></p></track>

<rp id="z55lf"></rp>

    <output id="z55lf"><ruby id="z55lf"><meter id="z55lf"></meter></ruby></output>

    單層鋼結構

    2021-05-07 08:49:06 2789

    單層鋼結構一般用于單層工業房屋。有普鋼(有人叫重鋼)和輕鋼。普鋼廠房 房屋主要承重構件為鋼屋架、鋼柱、鋼行車梁等,結構為柱、梁排架;輕鋼廠房 房屋主要承重構件為鋼柱、鋼梁,結構為鋼架,用于無行車的輕型車間。


    激情五月天淫秽片 av免费网址在线观看 精品毛片乱码1区2区3区 精品久久 精品盗摄

    <track id="z55lf"><p id="z55lf"><output id="z55lf"></output></p></track>

    <rp id="z55lf"></rp>

      <output id="z55lf"><ruby id="z55lf"><meter id="z55lf"></meter></ruby></output>