999精品色在线播放,亚洲国产精品无码久久播放,国产三级理论电影在线观看网址,免费又黄又爽又猛大片午夜

<address id="uuhbb"></address>
      <table id="uuhbb"></table>
      <video id="uuhbb"></video>

      <rp id="uuhbb"><track id="uuhbb"></track></rp>

      1. Distribution box

        image

        Distribution box


        1. Purpose and main functions


        It is used for power and lighting distribution in AC 50 Hz (60 Hz), 380 V (440 V), 50 Hz (60 Hz) and 220 V (110 V) DC 24 V electrical lines, and plays an overload and short circuit protection role on the controlled distribution lines. It is widely used in ships, large buildings, public housing and other places.
        The distribution box can be divided into wall mounted type and embedded type, including power distribution box, lighting distribution box, fuse box, etc.
         

        2. Model meaning