A.a not knowing
B.an unknowing
C.an unknown
D.a not known
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A.brake
B.devil's claw
C.pawls
D.All of the above
A.sand
B.soft soil
C.stiff clay
D.heterogeneous soil
A.shear ram
B.blind ram
C.pipe ram
D.annular ram
A.articulated anchor
B.Flipper Delta anchor
C.Baldt anchor
D.Danforth anchor
A.fairlead
B.heaving line
C.stay
D.warp
最新試題
Permission is kindly requested（）the ballast water.
Static electricity may be built up by the（）.
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 purpose of a bilge well is to（）.
Centrifugal pumps have what advantage(s) over reciprocating pumps?（）.
The most common type of davit found on merchant vessels today is the（）.
The exhaust pipe must be gas tight throughout its entire length otherwise（）.
The portable radio apparatus means（）.
An example of a modern anchor which has a stock is a(n)（）.
An example of a messenger is a（）.