标准 :DD1301 普通大小头 δ=3 δ=4 δ=4.5 δ=5 δ=6 δ=8 δ=9 δ=10 δ=11 δ=12 δ=14 1 500*400 530*426 300 10.5 14.0 15.8 17.5 21.0 28.0 31.5 35.0 38.5 42.0 49.0 2 600*500 630*530 300 12.8 17.1 19.2 21.3 25.6 34.1 38.4 42.7 46.9 51.2 59.7 3 700*600 720*630 300 14.9 19.9 22.4 24.8 29.8 39.7 44.7 49.7 54.6 59.6 69.5 4 800*700 820*720 300 17.1 22.8 25.7 28.4 34.2 45.6 51.3 57.0 62.7 68.4 79.8 5 900*800 920*820 300 19.