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单项选择题
A.suction side
B.discharge side
C.by-pass pipe
D.sampling pipe
单项选择题
A.pressure
B.velocity
C.gravity
D.viscosity
单项选择题
A.the temperature
B.the viscosity
C.the gravity
D.the size
单项选择题
A.water level
B.water flow
C.temperature
D.pressure
单项选择题
A.flat
B.slat
C.sweet
D.acid
单项选择题
A.starters
B.pressure switches
C.pressure
D.water
单项选择题
A.forced circulating pump
B.compressed air
C.gravity tank
D.bead tank
单项选择题
A.total dissolved solids
B.temperature of distillation of sea water
C.total dissolved sodium
D.total delivery system
单项选择题
A.sea water
B.fresh water
C.vapour
D.gas
单项选择题
A.shell and tube type
B.plate type
C.coil type
D.conical disc type