A.Globe valve
B.Butterfly valve
C.Gate valve
D.Packless valve
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A.swivel
B.cathead spool
C.drawworks
D.stand pipe
A.at each frame
B.amidships
C.one-third the distance from the bow
D.one-third the distance from the stern
A.greater at the bow and stern
B.reduced at the bow and stern
C.uniform over the length of the vessel
D.uniform over the length of the vessel，with the exception of the machinery spaces，where it is reduced due to increased stresses
A.Safe working load
B.Ship's working lift
C.Starboard wing lift
D.Stress，weight，load
A.crow bar
B.device to force a water tight door against the frame
C.heavy steel beam
D.wedge
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All electrical appliances aboard a vessel should be grounded to（）.
An LWT anchor often has difficulty tripping in（）.
Cargo pump relief valves are piped to the（）.
The portable radio apparatus means（）.
The connected joints of pipe，usually made of three joints of pipe approximately 90 feet long，racked in the derrick when making a trip are called a（）.
The C02 flooding system is actuated by a sequence of steps which are（）.
Anchors are prevented from running out when secured by the（）.
If a gasoline engine turns over freely but will not start，the cause is generally（）.
An integral part of a blowout preventer that serves as the closing element on an open hole，and whose ends do not fit around the drill pipe but seal against each other and shut off the space below completely is the（）.
In relation to cargo gear，what does SWL mean?（）.