Physical characteristics and technical requirements
1950 (nº 1678 a 1681; 1683; 1685 a 1688; 1690 a 1692; 1694 a 1707; 1709; 1711 a 1726; 1728)
1951 (nº 1731 a 1736; 1738 a1746; 1749 a 1757; 1760; 1762 e 1763; 1755; 1767 a 171774; 1778 e 1779)
1952 (nº 1780 e 1781; 1783 a 1792; 1794 a 1814; 1816 a 1822; 1824 a 1828)