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L2 Heavy-dust Wing Nut Thread Type Hydraulic Quick Coupling
L3 Manual Wing Nut Thread Type Hydraulic Quick Coupling
QZB275 Manual Push and Pull Thread-locked Hydraulic Quick Coupling
KZE-B Thread Sleeve Locked Type High Pressure Hydraulic Quick Coupling
1JG4-OG
K1 American Type Hydraulic Quick Coupling
1JG9-OG
K2 Japanese Type Hydraulic Quick Coupling
K3 Straight-through Hydraulic Quick Coupling ( steel+brass )