量程 0.5-2t 2.5-5t 7.5-10t A 130 171.5 222.2 B 15.8 19.1 25.4 C 25.4 38.1 50.8 D 76.2 95.3 120.6 E 31.8 38.1 50.8 F 31.8 38.1 50.8 H φ13.5 φ19.8 φ26.2 M 57 56 108 N 4 6 6 I M12*1.75 M20*1.50 M24*2.0