The 3-D printers offered to the construction market can perform retained form layer-by-layer for subsequent filling with reinforced structural concrete and insulation. The use of a single-stage polystyrene concrete with polystyrene granules bloated directly in the printer head allows to form layer-by-layer the insulated wall for its entire width and reduce the erection operation to on... https://chefesquipmenters.shop/product-category/knife-honing-steels/