GKZ53-C,开关硬件 SAFETY
GKZ53M,GKZ KEYS LEFT-RIGHT ADJ KEY
GKZ54,开关硬件 SAFETY
GKZ54-C,开关硬件 SAFETY
GKZ54M,GKZ KEYS -UP-DOWN ADJ KEY
GKZ55,开关硬件 SAFETY
GKZ55M,GKZ KEYS -MULTIDIRECTIONAL KEY
GKZ56,KEY STRAIGHT KEY GKE AND GKM
