Precast cement manhole covers: Workshop making&molding
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YouTubeCraftsman Vision
Precast cement manhole covers: Workshop making&molding
This video demonstrates the making process of cement manhole covers. First, the workers inspect and calibrate the prefabricated manhole cover molds to ensure tight splicing and precise dimensions. Then, they slowly pour well-mixed high-strength cement mortar into the molds. This cement mortar is formulated with special cement, crushed stone ...
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