68
0
40 60 80 100 120 150 180 200 250 300
a” 1560 2330 3110 3880 4660 5820 6980 7760 9690 11630
1950 2920 3890 4860 5830 7290 8740 9710 12140 14560
bx
cx–79.7
mm
a” ( ) = {(SS × 37.138/0.98268) – 54.422} × 1.025 + 64.9
a” ( ) = {(SS × 48.889/0.98268) – 53.731} × 0.975 + 64.9
b = x
c = x – 79.7
a” PSS-610 b c x
x
b
c
150.6
a”
116.5
261.4
46.5
88.4
35
34.7