DIN ISO 9745 28 28 71 280 > > > > > 28 81 280 45° L3 L4 W3 T1 W4 T2 货号 mm mm mm mm mm mm mm g 28 71 280 280 76.5 20.0 9.0 3.0 2.5 235 28 81 280 280 45° 70.0 20.0 20.0 9.0 2.5 2.5 235 46