KBFDG内置放大器：KBFDG4V-3-2C20N-Z-M1-PC7-H7-12 阀芯型式 (对中状态下 )2 –闭式中位（全部油口）9 33 – P 口关闭，A 和 B 至 T 阀芯流量额定值 03 – 3 L/min (0.79 US gpm)07 – 7 L/min (1.85 US gpm)13 – 13 L/min (3.43 US gpm)20– 20 L/min (5.28 US gpm...