| 摘要 |
PURPOSE: The present invention is strong against the external shock. The manufacturing cost is decreased while enhancing the availability of the wood dust. CONSTITUTION: The synthetic resin wood dust extrusion piping in which the wood dust is contained. As to the piping for constant or the sewage construction facilities shaped to resin. The resin wood dust mixture in which the wood dust(20) is and mixes added in the resin(10) and which is formed. With the thing(40) molded with the apparatus for extruding to the resin neck distribution pipe. |
