There are two holes in the manhole cover. Insert the crowbar (iron rod or steel bar can be used). When prying, tilt it. Lift it up a little and move it. Insert the iron bar or iron bar into the hole of the manhole cover. Put the steel bar into the hole and "pin" it, pull it up. After there is a gap between the cover and the edge of the cover, insert something to cushion it. When you can reach out, lift it up and open it with your hands.
Note: Since the manhole cover is very heavy, be sure to pay attention to safety when operating it. Before entering the sewer, you must first provide adequate ventilation. Because sewers are generally sealed, biogas and various toxic gases will be produced inside, so sufficient ventilation is necessary first.
Extended information:
First of all, you need to know which department the broken sewer manhole cover belongs to before you know where to look. The following is a summary of the application areas of the manhole cover. Take a look at the comparison of the words on the manhole cover. You'll know it right away.
Manhole covers for water supply projects: used in tap water, fire protection projects, etc. Heating engineering manhole covers: used in heating arm lines. Manhole covers for power supply projects: used in power supply cables, telecommunications projects, telephones, and communication cable pipelines.
Garden engineering manhole covers: used in supporting integrated pipelines. Gas engineering manhole covers: used in gas engineering, natural gas pipelines, etc. Street light engineering manhole covers: used in power supply, lighting, cable pipelines.