| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a railroad trough light and excellent in workability. <P>SOLUTION: The railroad trough comprises a conduit having a bottom plate, side wall plates and a U shape cross section with upper opening, and a lid fitted to an upper opening of the conduit, for opening and closing. The conduit and the lid are molded from a melted resin made of a chipped waste polystyrene resin added to a non-halogen flame retardant, a weatherproofer and a rat repellent, heated and melted. Link protrusions and link recesses are disposed at ends of the bottom plate, the side wall plates and lid, to be freely coupled to and removed from the other conduit and the lid. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
