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PP Hollow Plastic Formwork Introduction MTM PP Hollow plastic formwork is a kind of energy-saving and green environmental protection product, pp plastic combined with macromolecule nano-technology. Plastic formwork is a new product after wood formwork, composite steel formwork, bamboo-wood bonding formwork and all-steel large formwork. Hollow plastic formwork is energy saving and environmental protection,and can completely replace the traditional steel formwork, wood formwork