F15: with a total length of about 4.4 26cm, head diameter,shank diameter 5mm

F16: with a total length of about 4.8 26cm, head diameter,shank diameter 5.3mm;

F17: with a total length of about 5 26cm, head diameter,shank diameter 5.7mm;

F18 with a total length of about 5.2 26cm, head diameter,shank diameter 6mm;

F19 with a total length of about 5.4 26cm, head diameter,shank diameter 6.3mm,;

F20 with a total length of about 5.8 26cm, head diameter,shank diameter 6.7mm,

F21 with a total length of about 6 26cm, head diameter,shank diameter 7mm;

F22 with a total length of about 6.4 26cm, head diameter,shank diameter 7.3mm;

F23 with a total length of about 6.8 26cm, head diameter,shank diameter 7.7mm,

F24 with a total length of about 7 26cm, head diameter,shank diameter 8mm,

F25 with a total length of about 7.4 26cm, head diameter,shank diameter 8.3mm

F26 chief 26cm, head diameter 7.8, rod diameter of 8.7mm

The following is the real map: