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