| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a stream water drain tool with an inundation agent stored in the stream bottom made of concrete or the like. <P>SOLUTION: In a stream water drain tool, an inundation agent 1 formed in a certain desired shape is stored in a stream bottom 2 formed in a certain desired shape and made of concrete or the like. <P>COPYRIGHT: (C)2012,JPO&INPIT |
