electrical junction box造句

• The unit shall be equipped with an external , top located electrical junction box
  这种热水器应该配置一个外置的，位于上部的电气接线盒。
• The unit shall be equipped with a built - in electrical junction box . electrical heating elements shall be screw - in , direct - immersion , resistance - type . element operation shall be controlled by a thermostat for each element
  这种热水炉应该配置一个内置的电气接线盒。电气加热元件应该螺纹拧进的，直接浸入式，电阻型加热元件。每个加热元件的工作应该由一个温控器控制调节。