- 搜标题
- 搜题干
- 搜选项
单项选择题
_____ at the end of the distribution pipe ensures that adequate pressure is maintained by the pump.
_____ at the end of the distribution pipe ensures that adequate pressure is maintained by the pump.
A.A relief valve
B.An alarm
C.A pressure gauge
D.A non-maim valve
A.
A.A
B.An
C.A
D.A
A.A
B.An
C.A
D.A
