Relacionar Columnas MaterialesVersión en línea Materiales de las máquinas por ANDREA CAMARA 1 2 3 4 5 6 7 8 The pegs are made of plastic. The book is made of paper. The peg is made of wood. The lamp is made of metal. The sharpener is made of plastic. The sharpener is made of metal. The computer is made of glass. The pulley is made of metal.