Pullout Kitchen Faucet,Stainless Steel Pull-Out Faucets,304Ss Pull-Out Kitchen Faucets,Pull-Out Kithen Faucets HESHAN ULA KITCHEN UTENSILS CO.,LTD , https://www.ulakitchenware.com(High school grade 3 in Shanghai Education Edition) Mathematics: 15.1 "Polyhedron-Prism" Polyhedron-a space figure surrounded by several plane polygons Each polygon-the common side of the two faces of the polyhedron-the common point of the edges and edges of the polyhedron-the vertex of the polyhedron is relative to any face α of the polyhedron, the remaining faces are on the same side of α Polyhedron