| 摘要 |
PURPOSE: A manhole for preventing noise is provided to prevent a water leak and noise by inserting annular rings along the edge of a mounting part by tapering the contact part of the annular rings and the mounting part. CONSTITUTION: A manhole for preventing noise comprises a manhole cover(302), a manhole body(300), and a packing member(312). A vertical part(304), a mounting part(306), and a packing groove(310) are formed in the manhole body. The manhole cover covers the manhole body. The packing member is inserted into the packing groove. |
