| 摘要 |
PURPOSE: A height compensating manhole is provided to prevent a road from cracking by easily and continuously compensating a height difference between the manhole and a road surface. CONSTITUTION: A height compensating manhole comprises a manhole frame(10), a rotary frame(20), a mounting ring(26), and a manhole cover(30). The manhole frame forms a manhole base. The rotary frame is inserted into the manhole frame and is rotated. The mounting ring is coupled to the top of the rotary frame. The manhole cover is placed on the top of the mounting ring. |
