A.detachable link
B.stud link
C.Kenter link
D.connection link
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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
A.speed being made good
B.speed through the water
C.the set of the current
D.the depth of the water
A.at all times
B.in the bottom return mode
C.in the volume reverberation mode
D.only when there is no current
最新試題
What is it called when it is possible to ignite the vapour above the oil?（）
How long are you prohibited to consume alcohol prior to serving as a member of a watch?（）
According to the relevant regulation, lifeboat should be powered by（）.
The ISM code is part of（）.
Bales close to the deckhead should be covered to prevent（）.
It is dangerous for vessels without the operational radar（）the estuary.
（）is the act of allocating space to containers on board of a container ship in the order of the discharge ports.
The dew point temperature is（）.
Before any loading takes place any signs of the previous cargo should do（）.
Where would you find information about the time of high tide at a specific location on a particular day of the year?（）