Manhole covers are essential components in urban infrastructure, providing access to underground utilities such as sewer systems, telecommunications, and electrical lines. Traditionally, manhole covers have been made from cast iron or concrete. However, the use of polypropylene (PP) manhole covers has been gaining traction in recent years, largely due to advancements in molding technology and material science. Central to this development is the PP manhole cover mold, a specialized tool used...