Amono-pumpisasinglescrewpump.Thatmeansitconsistsof()rotor(S)。 A、TWOB、FourC、ThreeD、One
Amono-pumpisasinglescrewpump.Thatmeansitconsistsof()rotor(S)。
A、TWO
B、Four
C、Three
D、One
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