题目内容
On board a ship, fire is classified into ____ types, as of 2008.
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The big oil transportation companies voluntarily receive the evaluations from the ______.
Compared with the general inspection, the trade inspection is _______.
For example, a VLCC must receive ______ from the oil company cooperation and then the ship can get the opportunity to carry the oil cargo.
The abbreviation PSC stands for _______.
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