Shaft sealing in a centrifugal pump can be
题型:单项选择题
问题:
Shaft sealing in a centrifugal pump can be effected by ().
A.the mechanical seal
B.packed stuffing boxes
C.either A or B
D.neither A nor B
Shaft sealing in a centrifugal pump can be effected by ().
A.the mechanical seal
B.packed stuffing boxes
C.either A or B
D.neither A nor B