IOPP is the certificate for the vessel that is qualified for the requirements issued by the class on oil pollution prevention.
当船舶符合防污染要求时，船舶会得到船级社签发的IOPP证书。
IOPP is the certificate for the vessel that is qualified for the requirements issued by the class on oil pollution prevention.
当船舶符合防污染要求时，船舶会得到船级社签发的IOPP证书。
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