您要查找的是不是：
- 阀 valve
- u盘
- 电磁阀 solenoid pilot actuated valve
- 闸阀 gate(brake; shutoff; shut-off) valve
- 球阀 ball plug
- 截止阀 disconnecting valve
- 阀值 threshold values
- 单向阀 holding valve
- U盘/优盘 USB drive
- U形河曲内的土地在有这样的弯管的河里的地 The land within such a bend of a river.
- 阀芯 case
- 阀体 valve body
- 溢流阀 spillover valve
- 换向阀 reversing valve
- 阀杆 valve handle
- 调压阀 pressure regulating valve
- 水阀 hydrovalve
- 排污阀 wash water valve
- 旋塞阀 stopcock
- 疏水阀 bleeder
