| 摘要 |
A hinge structure of manhole assembly is provided to prevent the manhole cover from being fallen by impact since the hinge section of the manhole cover is settled down and fixed at the groove in the manhole cover opening. A hinge structure of manhole assembly comprises a manhole cover(100) in which the open part(30) is formed in the other side outer circumference of the hinge section, a manhole support frame formed with the open part seating groove edge so that the open part be settled in the other side outer circumference of the hinge settling portion. |
