Protection concrete piece for sewer
The utility model relates to a protection concrete piece for sewer and this concrete piece is provided with a double-layer manhole cover which makes the mouth of the well of the sewer provided with double safety and solves the problem that the accidents of personal casualties are easily caused after...
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Patent |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Schreiben Sie den ersten Kommentar!