| 摘要 |
A manhole head assembly for mounting a cover on a manhole column is disclosed. The manhole head assembly comprises a support member having a top portion made of a grindable material and a bottom portion shaped and sized to rest on the manhole column. The top and bottom portions form an inner shoulder sized and shaped to receive the cover. The manhole head assembly further comprises at least one removable spacer adapted to be disposed between the shoulder and the cover for adjusting the height thereof.
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