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