<video id="dlffz"><thead id="dlffz"><output id="dlffz"></output></thead></video><form id="dlffz"></form>
<form id="dlffz"></form>

    <ruby id="dlffz"></ruby>
      <cite id="dlffz"><dfn id="dlffz"></dfn></cite>
          <p id="dlffz"></p>

            About Us
            The north star arch valve of the world north valve group    North valve group is located in the center of Beijing economic and technological development zone supporting area, chairman of the board of directors of the company HongYiXiang from the beginning to the "product quality is the foundation, technology innovation is the motivation, whole-hearted service is the guarantee" the 21st word principle "as the core concept of enterprise development, led a group of vigorous north valve through wi...
            more >
            Products
            Project Case
            Hydropower station case
            Hydropower station caseHydropower station caseHydropower sta...
            more
            Chemical plant cases
            Chemical plant casesChemical plant casesChemical plant cases...
            more
            Nuclear power stations
            Nuclear power stationsNuclear power stationsNuclear power st...
            more
            News Contact Us
            > 蝶閥的結構和在使用過程存在的問題
            > 大型蝶閥導向柱偏斜變形的處理
            > 三偏心蝶閥密封面聯動磨削的運動特性分析
            > 彈性金屬硬密封蝶閥的結構特點
            > 偏心密封蝶閥及其它蝶閥的基本知識
            > 對夾式蝶閥的蝶板安裝
            > 閥門知識大全閥門知識原理閥門基礎知識
            > 法蘭蝶閥用途和特點
            Phone:010-67869341
            Fax :010-67867082
            Address:No. 1, qirong road, changzi camp, daxing district, Beijing
            E-mail:beifavip@163.com; beifa@chinabeifa.com
            Website:www.ydmpeek.com
            无码国模国产在线观看_最新国模无码国产在线视频_最新无码国产在线视频9299_2020无码最新国产在线观看

            <video id="dlffz"><thead id="dlffz"><output id="dlffz"></output></thead></video><form id="dlffz"></form>
            <form id="dlffz"></form>

              <ruby id="dlffz"></ruby>
                <cite id="dlffz"><dfn id="dlffz"></dfn></cite>
                    <p id="dlffz"></p>