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
