A.forces
B.enables
C.makes
D.is able to
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A.makes the experts to judge
B.enables the experts to judge
C.make the experts judging
D.enable the experts to judge
A.in entrance
B.in exit
C.in the upper part
D.on the outside
A.a reciprocating pump
B.a vane pump
C.a centrifugal pump
D.a triple screw pump
A.suction side
B.discharge side
C.by-pass pipe
D.sampling pipe
A.pressure
B.velocity
C.gravity
D.viscosity
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