Physical characteristics and technical requirements
1947 (nº 1528; 1530 a 1547; 1549 a 1560; 1567 ; 1569 a 1573)
1948 (nº 1574 a 1585; 1587 1595; 1599 a 1612; 1614 a 1620; 1622 a 1624; 1626)
1949 (nº 1627 a 1653; 1655 e 1656; 1658 a 1662; 1664 a 1669; 1671 a 1677)