由或代表船东签发 by or on behalf of the ship's owner
由或代表船东
By or on behalf of the shipowner
以上为机器翻译结果，长、整句建议使用 人工翻译 。
所有双层底为水密和油密，并应按规范要求由船东代表进行水压或气密试验。
All double bottom is watertight and oiltight. Compressed air testing and water-pressure tests can be carried out according to the classification society and by Owner's representative.
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