vessels must discharge afloat
...st acceptance (d/a); 若干日内承兑 *D/A; vessels must discharge afloat [Chartering and Shipping]; 船舶必须在漂浮状态卸货 *DAA; documents against acceptance (DA; D/A; d/a); 承兑交单 ..
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vessels must discharge afloat
船舶必须浮卸
以上为机器翻译结果，长、整句建议使用 人工翻译 。