A.screw pump
B.centrifugal pump
C.eductor
D.gear pump
您可能感興趣的試卷
你可能感興趣的試題
A.alternate expansion and contraction as water in a liquid state becomes a vapor
B.absorption of smoke and gases as water is converted from a liquid to a vapor
C.rapid contraction as water is converted from a liquid to a vapor
D.rapid expansion as water absorbs heat and changes to steam
A.detachable link
B.stud link
C.Kenter link
D.connection link
A.flame stopper
B.flame screen
C.flame filter
D.flame restrictor
A.enlarge bit
B.casing bit
C.hole opener
D.casing opener
A.velocity of the current
B.bottom characteristics
C.depth of the water
D.speed over the ground
最新試題
Before any loading takes place any signs of the previous cargo should do（）.
（）is the act of allocating space to containers on board of a container ship in the order of the discharge ports.
Despite the rising importance and great convenience of the gyrocompass,the magnetic compass still retain its importance because of its（）.
When the wave period and the apparent rolling period are the same（）.
In the Northern hemisphere northerly winds may cause temperature（）.
Full details of all lights and fog signals are shown on（）.
The mean draft of a ship is the draft（）.
Which of the following is not a form of precipitation?（）
A tide is called diurnal when（）.
Your vessel is docking, but not yet alongside. Which line will be the most useful when maneuvering the vessel alongside the pier?（）.