Type | Name | Nominal Size |
OEHC-MC-Type A | Oblong manhole covers with coaming | 450 ×350 600 ×400800 ×600 |
OEHC-MC-Type B | Flat manhole covers | 450 ×350 600 ×400 800 ×600 800 ×400(Elliptical) |
OEHC-MC-Type C | Sunk manhole covers with cover | |
OEHC-MC-Type D | Sunk manhole covers without cover |