1,SWITCH FOR PRESSURE GAUGE压力表开关2,PRESSURE GAUGE压力表3,BALL VALVE球阀4,VALVE BLOCK阀块5,QUICK RELEASE COUPLING快速接头6,TEST NIPPLE测压接头7,CHECK VALVE单向阀8,COUNTBALANCE VALVE平衡阀9,THROTTLE VALVE节流阀10,SHUT OFF VALVE截止阀11,PRESSURE REDUCING VALVE减压阀12,DRECTIONAL VALVE换向阀13,THROTTLE VALVE节流阀