A.Restricted area
B.Closed area
C.Prohibited place
D.Forbidden place
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最新試題
In ship construction，frame spacing is（）.
The portable radio apparatus means（）.
An example of a messenger is a（）.
As the propeller turns，voids are formed on the trailing and leading edges of the propeller blades causing a loss of propulsive efficiency，pitting of the blades，and vibration. These voids are known as（）.
On a ship，a door that is required to be marked KEEP CLOSED is designed to（）.
The boat is stowed on the davit rather than on a cradle with which type of davit?（）
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（）.
In ship operations，hoisting and lowering pipe in and out of the drilled hole is the main function of the（）.
The purpose of a bilge well is to（）.
In relation to cargo gear，what does SWL mean?（）.